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EasyCrypt, Cryptography Made Easy

Cryptography should be easy to use and hard to misuse. Cryptography should be boring.

EasyCrypt is a Java library and utility written in Java that implements military-grade Elliptic-curve cryptography (ECC) and related algorithms with an extremely simple interface. Programmers can just initialize the library with the appropriate preset, and then use simple operations to generate keys, encrypt and decrypt data. Support of RSA-based cryptography also is present for compatibility reasons.

Please see easycrypt-examples sub-project for examples

The Goals of EasyCrypt design are:

  1. Provide strong cryptography swiss knife with proper parameters of all algorithms.
  2. Easy of use. You do not need to know how different algorithms work inside or how to combine algorithms in the crypto system. You choose the appropriate preset and just use it.
  3. Extensibility. It should be easy to add new algorithms and configurations.
  4. It is written in Java and uses the BouncyCastle library. It can be used as-is in any JVM language. Java code of the library is mature and production-ready.

Components

For component description and other documentation, please see REAME.md files in the directory of the component.

History

The previous "incarnation" of this library, called fb-crypto has another two compatible libraries with a very similar interface written in C++ and JavaScript/TypeScript. All three libraries have a common compatibility test suite to ensure full interoperability. This work was one of my open-source projects at FirstBridge company.

This library contains Java code only, to be able to make a quick development, and may be used as upstream for former libraries.

Copyright

EasyCrypt is free software and licensed under Apache 2.0 License starting from version 1.4.0.

Releases

Current release is 1.4.0. It features streaming crypto and digesting interfaces, native builds with GraalVM, and identity library with examples. Fore the security reason, the minimal Java version now is 21.

How do I get set up?

  • Java requirements: JDK 11 or up to 16 for pure Java usage. GraalVM 21.0.0 or later for native image builds.

Experimental stuff

The goal of experiments is to compile Java code into objects usable from other languages, particularly C++, Rust and Javascript. There is no stable toolset yet, except GraalVM. If you know some other tools that can produce WebAssembly code from Java bytecode, please send me a note.

GIT branches

  • main — latest stable version
  • develop — latest development version
  • feature/FEATURE_NAME — new feature development to be merged with the 'develop' branch when complete

Contribution guidelines

  • If you find a bug, please write an issue with how to reproduce steps or an example
  • If you have a patch, enhancement, or new feature, please fork this project and make a cross-fork pull request to the 'develop' branch

Credits

Thanks to friends and colleagues:

Andrii Zinchenko for great help with making the library interfaсе simple and clear.

Serhii Lymar for ElGamal code and a big impact on library improvement.

Who do I talk to?

Oleksiy Lukin alukin@gmail.com

About

Easy to use Java cryptography library with ECC and RSA support; X.509 certificates and CSRs

Topics

bouncycastlecryptographyeccjavajava-libraryrsa

Resources

Readme
Activity

Stars

19 stars

Watchers

4 watching

Forks

3 forks
Report repository

Releases

Packages

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
BranchesTags
Repository files navigation
EasyCrypt, Cryptography Made Easy
Cryptography should be easy to use and hard to misuse. Cryptography should be boring.
EasyCrypt is a Java library and utility written in Java that implements military-grade Elliptic-curve cryptography (ECC)
and related algorithms with an extremely simple interface. Programmers can just initialize the library with the
appropriate preset, and then use simple operations to generate keys, encrypt and decrypt data. Support of RSA-based
cryptography also is present for compatibility reasons.
Please see easycrypt-examples sub-project for examples
The Goals of EasyCrypt design are:
  1. Provide strong cryptography swiss knife with proper parameters of all algorithms.
  2. Easy of use. You do not need to know how different algorithms work inside or how to combine algorithms in the
crypto system. You choose the appropriate preset and just use it.
  3. Extensibility. It should be easy to add new algorithms and configurations.
  4. It is written in Java and uses the BouncyCastle library. It can be used as-is in any JVM language. Java code of the
library is mature and production-ready.
Components
For component description and other documentation, please see REAME.md files in the directory of the component.
History
The previous "incarnation" of this library, called fb-crypto has another two compatible libraries with a very similar
interface written in C++ and JavaScript/TypeScript. All three libraries have a common compatibility test suite to ensure
full interoperability. This work was one of my open-source projects at FirstBridge company.
This library contains Java code only, to be able to make a quick development, and may be used as upstream for former
libraries.
Copyright
EasyCrypt is free software and licensed under Apache 2.0 License starting from version 1.4.0.
Releases
Current release is 1.4.0. It features streaming crypto and digesting interfaces, native builds with GraalVM,
and identity library with examples. Fore the security reason, the minimal Java version now is 21.
How do I get set up?
  • Java requirements: JDK 11 or up to 16 for pure Java usage. GraalVM 21.0.0 or later for native image builds.
Experimental stuff
The goal of experiments is to compile Java code into objects usable from other languages, particularly C++, Rust and
Javascript. There is no stable toolset yet, except GraalVM. If you know some other tools that can produce WebAssembly
code from Java bytecode, please send me a note.
GIT branches
  • main — latest stable version
  • develop — latest development version
  • feature/FEATURE_NAME — new feature development to be merged with the 'develop' branch when complete
Contribution guidelines
  • If you find a bug, please write an issue with how to reproduce steps or an example
  • If you have a patch, enhancement, or new feature, please fork this project and make a cross-fork pull request to the
'develop' branch
Credits
Thanks to friends and colleagues:
Andrii Zinchenko for great help with making the library interfaсе simple and clear.
Serhii Lymar for ElGamal code and a big impact on library improvement.
Who do I talk to?
Oleksiy Lukin alukin@gmail.com
About
Easy to use Java cryptography library with ECC and RSA support; X.509 certificates and CSRs
Topics
bouncycastlecryptographyeccjavajava-libraryrsa
Resources
Readme
Activity
Stars
19 stars
Watchers
4 watching
Forks
3 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
EasyCrypt, Cryptography Made Easy
Cryptography should be easy to use and hard to misuse. Cryptography should be boring.
EasyCrypt is a Java library and utility written in Java that implements military-grade Elliptic-curve cryptography (ECC)
and related algorithms with an extremely simple interface. Programmers can just initialize the library with the
appropriate preset, and then use simple operations to generate keys, encrypt and decrypt data. Support of RSA-based
cryptography also is present for compatibility reasons.
Please see easycrypt-examples sub-project for examples
The Goals of EasyCrypt design are:
  1. Provide strong cryptography swiss knife with proper parameters of all algorithms.
  2. Easy of use. You do not need to know how different algorithms work inside or how to combine algorithms in the
crypto system. You choose the appropriate preset and just use it.
  3. Extensibility. It should be easy to add new algorithms and configurations.
  4. It is written in Java and uses the BouncyCastle library. It can be used as-is in any JVM language. Java code of the
library is mature and production-ready.
Components
For component description and other documentation, please see REAME.md files in the directory of the component.
History
The previous "incarnation" of this library, called fb-crypto has another two compatible libraries with a very similar
interface written in C++ and JavaScript/TypeScript. All three libraries have a common compatibility test suite to ensure
full interoperability. This work was one of my open-source projects at FirstBridge company.
This library contains Java code only, to be able to make a quick development, and may be used as upstream for former
libraries.
Copyright
EasyCrypt is free software and licensed under Apache 2.0 License starting from version 1.4.0.
Releases
Current release is 1.4.0. It features streaming crypto and digesting interfaces, native builds with GraalVM,
and identity library with examples. Fore the security reason, the minimal Java version now is 21.
How do I get set up?
  • Java requirements: JDK 11 or up to 16 for pure Java usage. GraalVM 21.0.0 or later for native image builds.
Experimental stuff
The goal of experiments is to compile Java code into objects usable from other languages, particularly C++, Rust and
Javascript. There is no stable toolset yet, except GraalVM. If you know some other tools that can produce WebAssembly
code from Java bytecode, please send me a note.
GIT branches
  • main — latest stable version
  • develop — latest development version
  • feature/FEATURE_NAME — new feature development to be merged with the 'develop' branch when complete
Contribution guidelines
  • If you find a bug, please write an issue with how to reproduce steps or an example
  • If you have a patch, enhancement, or new feature, please fork this project and make a cross-fork pull request to the
'develop' branch
Credits
Thanks to friends and colleagues:
Andrii Zinchenko for great help with making the library interfaсе simple and clear.
Serhii Lymar for ElGamal code and a big impact on library improvement.
Who do I talk to?
Oleksiy Lukin alukin@gmail.com
About
Easy to use Java cryptography library with ECC and RSA support; X.509 certificates and CSRs
Topics
bouncycastlecryptographyeccjavajava-libraryrsa
Resources
Readme
Activity
Stars
19 stars
Watchers
4 watching
Forks
3 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
EasyCrypt, Cryptography Made Easy
Cryptography should be easy to use and hard to misuse. Cryptography should be boring.
EasyCrypt is a Java library and utility written in Java that implements military-grade Elliptic-curve cryptography (ECC)
and related algorithms with an extremely simple interface. Programmers can just initialize the library with the
appropriate preset, and then use simple operations to generate keys, encrypt and decrypt data. Support of RSA-based
cryptography also is present for compatibility reasons.
Please see easycrypt-examples sub-project for examples
The Goals of EasyCrypt design are:
  1. Provide strong cryptography swiss knife with proper parameters of all algorithms.
  2. Easy of use. You do not need to know how different algorithms work inside or how to combine algorithms in the
crypto system. You choose the appropriate preset and just use it.
  3. Extensibility. It should be easy to add new algorithms and configurations.
  4. It is written in Java and uses the BouncyCastle library. It can be used as-is in any JVM language. Java code of the
library is mature and production-ready.
Components
For component description and other documentation, please see REAME.md files in the directory of the component.
History
The previous "incarnation" of this library, called fb-crypto has another two compatible libraries with a very similar
interface written in C++ and JavaScript/TypeScript. All three libraries have a common compatibility test suite to ensure
full interoperability. This work was one of my open-source projects at FirstBridge company.
This library contains Java code only, to be able to make a quick development, and may be used as upstream for former
libraries.
Copyright
EasyCrypt is free software and licensed under Apache 2.0 License starting from version 1.4.0.
Releases
Current release is 1.4.0. It features streaming crypto and digesting interfaces, native builds with GraalVM,
and identity library with examples. Fore the security reason, the minimal Java version now is 21.
How do I get set up?
  • Java requirements: JDK 11 or up to 16 for pure Java usage. GraalVM 21.0.0 or later for native image builds.
Experimental stuff
The goal of experiments is to compile Java code into objects usable from other languages, particularly C++, Rust and
Javascript. There is no stable toolset yet, except GraalVM. If you know some other tools that can produce WebAssembly
code from Java bytecode, please send me a note.
GIT branches
  • main — latest stable version
  • develop — latest development version
  • feature/FEATURE_NAME — new feature development to be merged with the 'develop' branch when complete
Contribution guidelines
  • If you find a bug, please write an issue with how to reproduce steps or an example
  • If you have a patch, enhancement, or new feature, please fork this project and make a cross-fork pull request to the
'develop' branch
Credits
Thanks to friends and colleagues:
Andrii Zinchenko for great help with making the library interfaсе simple and clear.
Serhii Lymar for ElGamal code and a big impact on library improvement.
Who do I talk to?
Oleksiy Lukin alukin@gmail.com
About
Easy to use Java cryptography library with ECC and RSA support; X.509 certificates and CSRs
Topics
bouncycastlecryptographyeccjavajava-libraryrsa
Resources
Readme
Activity
Stars
19 stars
Watchers
4 watching
Forks
3 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
EasyCrypt, Cryptography Made Easy
Cryptography should be easy to use and hard to misuse. Cryptography should be boring.
EasyCrypt is a Java library and utility written in Java that implements military-grade Elliptic-curve cryptography (ECC)
and related algorithms with an extremely simple interface. Programmers can just initialize the library with the
appropriate preset, and then use simple operations to generate keys, encrypt and decrypt data. Support of RSA-based
cryptography also is present for compatibility reasons.
Please see easycrypt-examples sub-project for examples
The Goals of EasyCrypt design are:
  1. Provide strong cryptography swiss knife with proper parameters of all algorithms.
  2. Easy of use. You do not need to know how different algorithms work inside or how to combine algorithms in the
crypto system. You choose the appropriate preset and just use it.
  3. Extensibility. It should be easy to add new algorithms and configurations.
  4. It is written in Java and uses the BouncyCastle library. It can be used as-is in any JVM language. Java code of the
library is mature and production-ready.
Components
For component description and other documentation, please see REAME.md files in the directory of the component.
History
The previous "incarnation" of this library, called fb-crypto has another two compatible libraries with a very similar
interface written in C++ and JavaScript/TypeScript. All three libraries have a common compatibility test suite to ensure
full interoperability. This work was one of my open-source projects at FirstBridge company.
This library contains Java code only, to be able to make a quick development, and may be used as upstream for former
libraries.
Copyright
EasyCrypt is free software and licensed under Apache 2.0 License starting from version 1.4.0.
Releases
Current release is 1.4.0. It features streaming crypto and digesting interfaces, native builds with GraalVM,
and identity library with examples. Fore the security reason, the minimal Java version now is 21.
How do I get set up?
  • Java requirements: JDK 11 or up to 16 for pure Java usage. GraalVM 21.0.0 or later for native image builds.
Experimental stuff
The goal of experiments is to compile Java code into objects usable from other languages, particularly C++, Rust and
Javascript. There is no stable toolset yet, except GraalVM. If you know some other tools that can produce WebAssembly
code from Java bytecode, please send me a note.
GIT branches
  • main — latest stable version
  • develop — latest development version
  • feature/FEATURE_NAME — new feature development to be merged with the 'develop' branch when complete
Contribution guidelines
  • If you find a bug, please write an issue with how to reproduce steps or an example
  • If you have a patch, enhancement, or new feature, please fork this project and make a cross-fork pull request to the
'develop' branch
Credits
Thanks to friends and colleagues:
Andrii Zinchenko for great help with making the library interfaсе simple and clear.
Serhii Lymar for ElGamal code and a big impact on library improvement.
Who do I talk to?
Oleksiy Lukin alukin@gmail.com
About
Easy to use Java cryptography library with ECC and RSA support; X.509 certificates and CSRs
Topics
bouncycastlecryptographyeccjavajava-libraryrsa
Resources
Readme
Activity
Stars
19 stars
Watchers
4 watching
Forks
3 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
EasyCrypt, Cryptography Made Easy
Cryptography should be easy to use and hard to misuse. Cryptography should be boring.
EasyCrypt is a Java library and utility written in Java that implements military-grade Elliptic-curve cryptography (ECC)
and related algorithms with an extremely simple interface. Programmers can just initialize the library with the
appropriate preset, and then use simple operations to generate keys, encrypt and decrypt data. Support of RSA-based
cryptography also is present for compatibility reasons.
Please see easycrypt-examples sub-project for examples
The Goals of EasyCrypt design are:
  1. Provide strong cryptography swiss knife with proper parameters of all algorithms.
  2. Easy of use. You do not need to know how different algorithms work inside or how to combine algorithms in the
crypto system. You choose the appropriate preset and just use it.
  3. Extensibility. It should be easy to add new algorithms and configurations.
  4. It is written in Java and uses the BouncyCastle library. It can be used as-is in any JVM language. Java code of the
library is mature and production-ready.
Components
For component description and other documentation, please see REAME.md files in the directory of the component.
History
The previous "incarnation" of this library, called fb-crypto has another two compatible libraries with a very similar
interface written in C++ and JavaScript/TypeScript. All three libraries have a common compatibility test suite to ensure
full interoperability. This work was one of my open-source projects at FirstBridge company.
This library contains Java code only, to be able to make a quick development, and may be used as upstream for former
libraries.
Copyright
EasyCrypt is free software and licensed under Apache 2.0 License starting from version 1.4.0.
Releases
Current release is 1.4.0. It features streaming crypto and digesting interfaces, native builds with GraalVM,
and identity library with examples. Fore the security reason, the minimal Java version now is 21.
How do I get set up?
  • Java requirements: JDK 11 or up to 16 for pure Java usage. GraalVM 21.0.0 or later for native image builds.
Experimental stuff
The goal of experiments is to compile Java code into objects usable from other languages, particularly C++, Rust and
Javascript. There is no stable toolset yet, except GraalVM. If you know some other tools that can produce WebAssembly
code from Java bytecode, please send me a note.
GIT branches
  • main — latest stable version
  • develop — latest development version
  • feature/FEATURE_NAME — new feature development to be merged with the 'develop' branch when complete
Contribution guidelines
  • If you find a bug, please write an issue with how to reproduce steps or an example
  • If you have a patch, enhancement, or new feature, please fork this project and make a cross-fork pull request to the
'develop' branch
Credits
Thanks to friends and colleagues:
Andrii Zinchenko for great help with making the library interfaсе simple and clear.
Serhii Lymar for ElGamal code and a big impact on library improvement.
Who do I talk to?
Oleksiy Lukin alukin@gmail.com
About
Easy to use Java cryptography library with ECC and RSA support; X.509 certificates and CSRs
Topics
bouncycastlecryptographyeccjavajava-libraryrsa
Resources
Readme
Activity
Stars
19 stars
Watchers
4 watching
Forks
3 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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EasyCrypt, Cryptography Made Easy
Cryptography should be easy to use and hard to misuse. Cryptography should be boring.
EasyCrypt is a Java library and utility written in Java that implements military-grade Elliptic-curve cryptography (ECC)
and related algorithms with an extremely simple interface. Programmers can just initialize the library with the
appropriate preset, and then use simple operations to generate keys, encrypt and decrypt data. Support of RSA-based
cryptography also is present for compatibility reasons.
Please see easycrypt-examples sub-project for examples
The Goals of EasyCrypt design are:
  1. Provide strong cryptography swiss knife with proper parameters of all algorithms.
  2. Easy of use. You do not need to know how different algorithms work inside or how to combine algorithms in the
crypto system. You choose the appropriate preset and just use it.
  3. Extensibility. It should be easy to add new algorithms and configurations.
  4. It is written in Java and uses the BouncyCastle library. It can be used as-is in any JVM language. Java code of the
library is mature and production-ready.
Components
For component description and other documentation, please see REAME.md files in the directory of the component.
History
The previous "incarnation" of this library, called fb-crypto has another two compatible libraries with a very similar
interface written in C++ and JavaScript/TypeScript. All three libraries have a common compatibility test suite to ensure
full interoperability. This work was one of my open-source projects at FirstBridge company.
This library contains Java code only, to be able to make a quick development, and may be used as upstream for former
libraries.
Copyright
EasyCrypt is free software and licensed under Apache 2.0 License starting from version 1.4.0.
Releases
Current release is 1.4.0. It features streaming crypto and digesting interfaces, native builds with GraalVM,
and identity library with examples. Fore the security reason, the minimal Java version now is 21.
How do I get set up?
  • Java requirements: JDK 11 or up to 16 for pure Java usage. GraalVM 21.0.0 or later for native image builds.
Experimental stuff
The goal of experiments is to compile Java code into objects usable from other languages, particularly C++, Rust and
Javascript. There is no stable toolset yet, except GraalVM. If you know some other tools that can produce WebAssembly
code from Java bytecode, please send me a note.
GIT branches
  • main — latest stable version
  • develop — latest development version
  • feature/FEATURE_NAME — new feature development to be merged with the 'develop' branch when complete
Contribution guidelines
  • If you find a bug, please write an issue with how to reproduce steps or an example
  • If you have a patch, enhancement, or new feature, please fork this project and make a cross-fork pull request to the
'develop' branch
Credits
Thanks to friends and colleagues:
Andrii Zinchenko for great help with making the library interfaсе simple and clear.
Serhii Lymar for ElGamal code and a big impact on library improvement.
Who do I talk to?
Oleksiy Lukin alukin@gmail.com
About
Easy to use Java cryptography library with ECC and RSA support; X.509 certificates and CSRs
Topics
bouncycastlecryptographyeccjavajava-libraryrsa
Resources
Readme
Activity
Stars
19 stars
Watchers
4 watching
Forks
3 forks
Report repository
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Used by
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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BranchesTags
Repository files navigation
EasyCrypt, Cryptography Made Easy
Cryptography should be easy to use and hard to misuse. Cryptography should be boring.
EasyCrypt is a Java library and utility written in Java that implements military-grade Elliptic-curve cryptography (ECC)
and related algorithms with an extremely simple interface. Programmers can just initialize the library with the
appropriate preset, and then use simple operations to generate keys, encrypt and decrypt data. Support of RSA-based
cryptography also is present for compatibility reasons.
Please see easycrypt-examples sub-project for examples
The Goals of EasyCrypt design are:
  1. Provide strong cryptography swiss knife with proper parameters of all algorithms.
  2. Easy of use. You do not need to know how different algorithms work inside or how to combine algorithms in the
crypto system. You choose the appropriate preset and just use it.
  3. Extensibility. It should be easy to add new algorithms and configurations.
  4. It is written in Java and uses the BouncyCastle library. It can be used as-is in any JVM language. Java code of the
library is mature and production-ready.
Components
For component description and other documentation, please see REAME.md files in the directory of the component.
History
The previous "incarnation" of this library, called fb-crypto has another two compatible libraries with a very similar
interface written in C++ and JavaScript/TypeScript. All three libraries have a common compatibility test suite to ensure
full interoperability. This work was one of my open-source projects at FirstBridge company.
This library contains Java code only, to be able to make a quick development, and may be used as upstream for former
libraries.
Copyright
EasyCrypt is free software and licensed under Apache 2.0 License starting from version 1.4.0.
Releases
Current release is 1.4.0. It features streaming crypto and digesting interfaces, native builds with GraalVM,
and identity library with examples. Fore the security reason, the minimal Java version now is 21.
How do I get set up?
  • Java requirements: JDK 11 or up to 16 for pure Java usage. GraalVM 21.0.0 or later for native image builds.
Experimental stuff
The goal of experiments is to compile Java code into objects usable from other languages, particularly C++, Rust and
Javascript. There is no stable toolset yet, except GraalVM. If you know some other tools that can produce WebAssembly
code from Java bytecode, please send me a note.
GIT branches
  • main — latest stable version
  • develop — latest development version
  • feature/FEATURE_NAME — new feature development to be merged with the 'develop' branch when complete
Contribution guidelines
  • If you find a bug, please write an issue with how to reproduce steps or an example
  • If you have a patch, enhancement, or new feature, please fork this project and make a cross-fork pull request to the
'develop' branch
Credits
Thanks to friends and colleagues:
Andrii Zinchenko for great help with making the library interfaсе simple and clear.
Serhii Lymar for ElGamal code and a big impact on library improvement.
Who do I talk to?
Oleksiy Lukin alukin@gmail.com
About
Easy to use Java cryptography library with ECC and RSA support; X.509 certificates and CSRs
Topics
bouncycastlecryptographyeccjavajava-libraryrsa
Resources
Readme
Activity
Stars
19 stars
Watchers
4 watching
Forks
3 forks
Report repository
Releases
Packages
Used by
Contributors
Languages