BranchesTags

Repository files navigation

Tanker logo

Tanker: How it works

Technical specification of the Tanker SDK and protocol for end-to-end encryption

This document is a deep dive into the design of Tanker Core, its infrastructure, the cryptographic underpinnings and algorithms, what transits over the protocol, and the security model. It aims to be open and to answer all of the possible questions one might ask when considering adopting this technology.

If you have additional questions that you'd like to see answered, please open an issue.

We want to stress that you don't need to understand this spec in order to use the Tanker SDK. Its APIs are simple and require no cryptographic skills. To learn how to integrate the Tanker SDK in your apps, please refer to our documentation.

Table of contents

Copyright

The document as a whole and each of the elements that composes it (texts, articles, photographs, illustrations, diagrams, tables, logos, trademarks, architecture, software code) are protected by intellectual property law and are the exclusive property of or are licensed to Tanker. Tanker grants a non-exclusive right to use (in particular, by downloading, reproduction, representation) such document and its elements strictly for internal use for the purpose of assessing the opportunity to adopt Tanker’s technology. Any other use, and particularly any use for commercial purpose is not allowed.

About

Technical specification of the Tanker SDK and protocol for end-to-end encryption

Topics

cryptographyencryptionend-to-endprivacysdksecurityspecificationtanker

Resources

Readme
Activity
Custom properties

Stars

18 stars

Watchers

0 watching

Forks

4 forks
Report repository

Releases

Packages

Used by

Contributors

, '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
Tanker logo
Tanker: How it works
Technical specification of the Tanker SDK and protocol for end-to-end encryption
This document is a deep dive into the design of Tanker Core, its infrastructure, the cryptographic underpinnings and algorithms, what transits over the protocol, and the security model. It aims to be open and to answer all of the possible questions one might ask when considering adopting this technology.
If you have additional questions that you'd like to see answered, please open an issue.
We want to stress that you don't need to understand this spec in order to use the Tanker SDK. Its APIs are simple and require no cryptographic skills. To learn how to integrate the Tanker SDK in your apps, please refer to our documentation.
Table of contents
Copyright
The document as a whole and each of the elements that composes it (texts, articles, photographs, illustrations, diagrams, tables, logos, trademarks, architecture, software code) are protected by intellectual property law and are the exclusive property of or are licensed to Tanker. Tanker grants a non-exclusive right to use (in particular, by downloading, reproduction, representation) such document and its elements strictly for internal use for the purpose of assessing the opportunity to adopt Tanker’s technology. Any other use, and particularly any use for commercial purpose is not allowed.
About
Technical specification of the Tanker SDK and protocol for end-to-end encryption
Topics
cryptographyencryptionend-to-endprivacysdksecurityspecificationtanker
Resources
Readme
Activity
Custom properties
Stars
18 stars
Watchers
0 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors

, '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
Tanker logo
Tanker: How it works
Technical specification of the Tanker SDK and protocol for end-to-end encryption
This document is a deep dive into the design of Tanker Core, its infrastructure, the cryptographic underpinnings and algorithms, what transits over the protocol, and the security model. It aims to be open and to answer all of the possible questions one might ask when considering adopting this technology.
If you have additional questions that you'd like to see answered, please open an issue.
We want to stress that you don't need to understand this spec in order to use the Tanker SDK. Its APIs are simple and require no cryptographic skills. To learn how to integrate the Tanker SDK in your apps, please refer to our documentation.
Table of contents
Copyright
The document as a whole and each of the elements that composes it (texts, articles, photographs, illustrations, diagrams, tables, logos, trademarks, architecture, software code) are protected by intellectual property law and are the exclusive property of or are licensed to Tanker. Tanker grants a non-exclusive right to use (in particular, by downloading, reproduction, representation) such document and its elements strictly for internal use for the purpose of assessing the opportunity to adopt Tanker’s technology. Any other use, and particularly any use for commercial purpose is not allowed.
About
Technical specification of the Tanker SDK and protocol for end-to-end encryption
Topics
cryptographyencryptionend-to-endprivacysdksecurityspecificationtanker
Resources
Readme
Activity
Custom properties
Stars
18 stars
Watchers
0 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors

, '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
Tanker logo
Tanker: How it works
Technical specification of the Tanker SDK and protocol for end-to-end encryption
This document is a deep dive into the design of Tanker Core, its infrastructure, the cryptographic underpinnings and algorithms, what transits over the protocol, and the security model. It aims to be open and to answer all of the possible questions one might ask when considering adopting this technology.
If you have additional questions that you'd like to see answered, please open an issue.
We want to stress that you don't need to understand this spec in order to use the Tanker SDK. Its APIs are simple and require no cryptographic skills. To learn how to integrate the Tanker SDK in your apps, please refer to our documentation.
Table of contents
Copyright
The document as a whole and each of the elements that composes it (texts, articles, photographs, illustrations, diagrams, tables, logos, trademarks, architecture, software code) are protected by intellectual property law and are the exclusive property of or are licensed to Tanker. Tanker grants a non-exclusive right to use (in particular, by downloading, reproduction, representation) such document and its elements strictly for internal use for the purpose of assessing the opportunity to adopt Tanker’s technology. Any other use, and particularly any use for commercial purpose is not allowed.
About
Technical specification of the Tanker SDK and protocol for end-to-end encryption
Topics
cryptographyencryptionend-to-endprivacysdksecurityspecificationtanker
Resources
Readme
Activity
Custom properties
Stars
18 stars
Watchers
0 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors

, '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
Tanker logo
Tanker: How it works
Technical specification of the Tanker SDK and protocol for end-to-end encryption
This document is a deep dive into the design of Tanker Core, its infrastructure, the cryptographic underpinnings and algorithms, what transits over the protocol, and the security model. It aims to be open and to answer all of the possible questions one might ask when considering adopting this technology.
If you have additional questions that you'd like to see answered, please open an issue.
We want to stress that you don't need to understand this spec in order to use the Tanker SDK. Its APIs are simple and require no cryptographic skills. To learn how to integrate the Tanker SDK in your apps, please refer to our documentation.
Table of contents
Copyright
The document as a whole and each of the elements that composes it (texts, articles, photographs, illustrations, diagrams, tables, logos, trademarks, architecture, software code) are protected by intellectual property law and are the exclusive property of or are licensed to Tanker. Tanker grants a non-exclusive right to use (in particular, by downloading, reproduction, representation) such document and its elements strictly for internal use for the purpose of assessing the opportunity to adopt Tanker’s technology. Any other use, and particularly any use for commercial purpose is not allowed.
About
Technical specification of the Tanker SDK and protocol for end-to-end encryption
Topics
cryptographyencryptionend-to-endprivacysdksecurityspecificationtanker
Resources
Readme
Activity
Custom properties
Stars
18 stars
Watchers
0 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors

, '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
Tanker logo
Tanker: How it works
Technical specification of the Tanker SDK and protocol for end-to-end encryption
This document is a deep dive into the design of Tanker Core, its infrastructure, the cryptographic underpinnings and algorithms, what transits over the protocol, and the security model. It aims to be open and to answer all of the possible questions one might ask when considering adopting this technology.
If you have additional questions that you'd like to see answered, please open an issue.
We want to stress that you don't need to understand this spec in order to use the Tanker SDK. Its APIs are simple and require no cryptographic skills. To learn how to integrate the Tanker SDK in your apps, please refer to our documentation.
Table of contents
Copyright
The document as a whole and each of the elements that composes it (texts, articles, photographs, illustrations, diagrams, tables, logos, trademarks, architecture, software code) are protected by intellectual property law and are the exclusive property of or are licensed to Tanker. Tanker grants a non-exclusive right to use (in particular, by downloading, reproduction, representation) such document and its elements strictly for internal use for the purpose of assessing the opportunity to adopt Tanker’s technology. Any other use, and particularly any use for commercial purpose is not allowed.
About
Technical specification of the Tanker SDK and protocol for end-to-end encryption
Topics
cryptographyencryptionend-to-endprivacysdksecurityspecificationtanker
Resources
Readme
Activity
Custom properties
Stars
18 stars
Watchers
0 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Tanker logo
Tanker: How it works
Technical specification of the Tanker SDK and protocol for end-to-end encryption
This document is a deep dive into the design of Tanker Core, its infrastructure, the cryptographic underpinnings and algorithms, what transits over the protocol, and the security model. It aims to be open and to answer all of the possible questions one might ask when considering adopting this technology.
If you have additional questions that you'd like to see answered, please open an issue.
We want to stress that you don't need to understand this spec in order to use the Tanker SDK. Its APIs are simple and require no cryptographic skills. To learn how to integrate the Tanker SDK in your apps, please refer to our documentation.
Table of contents
Copyright
The document as a whole and each of the elements that composes it (texts, articles, photographs, illustrations, diagrams, tables, logos, trademarks, architecture, software code) are protected by intellectual property law and are the exclusive property of or are licensed to Tanker. Tanker grants a non-exclusive right to use (in particular, by downloading, reproduction, representation) such document and its elements strictly for internal use for the purpose of assessing the opportunity to adopt Tanker’s technology. Any other use, and particularly any use for commercial purpose is not allowed.
About
Technical specification of the Tanker SDK and protocol for end-to-end encryption
Topics
cryptographyencryptionend-to-endprivacysdksecurityspecificationtanker
Resources
Readme
Activity
Custom properties
Stars
18 stars
Watchers
0 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors

, '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); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
Tanker logo
Tanker: How it works
Technical specification of the Tanker SDK and protocol for end-to-end encryption
This document is a deep dive into the design of Tanker Core, its infrastructure, the cryptographic underpinnings and algorithms, what transits over the protocol, and the security model. It aims to be open and to answer all of the possible questions one might ask when considering adopting this technology.
If you have additional questions that you'd like to see answered, please open an issue.
We want to stress that you don't need to understand this spec in order to use the Tanker SDK. Its APIs are simple and require no cryptographic skills. To learn how to integrate the Tanker SDK in your apps, please refer to our documentation.
Table of contents
Copyright
The document as a whole and each of the elements that composes it (texts, articles, photographs, illustrations, diagrams, tables, logos, trademarks, architecture, software code) are protected by intellectual property law and are the exclusive property of or are licensed to Tanker. Tanker grants a non-exclusive right to use (in particular, by downloading, reproduction, representation) such document and its elements strictly for internal use for the purpose of assessing the opportunity to adopt Tanker’s technology. Any other use, and particularly any use for commercial purpose is not allowed.
About
Technical specification of the Tanker SDK and protocol for end-to-end encryption
Topics
cryptographyencryptionend-to-endprivacysdksecurityspecificationtanker
Resources
Readme
Activity
Custom properties
Stars
18 stars
Watchers
0 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors