Add SEO: sitemap.xml, robots.txt, meta tags + structured data
- sitemap.xml (homepage) + robots.txt (allow crawl, disallow /api/, link sitemap) - <head>: SEO title, meta description, keywords, canonical, robots - Open Graph + Twitter Card tags for link previews - JSON-LD WebApplication structured data (features, free, publisher) - <noscript> crawlable content so the JS-rendered SPA has indexable text - SW cache v11 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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King Omar
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4 changed files with 83 additions and 3 deletions
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<meta charset="utf-8" />
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
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<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
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<meta name="theme-color" content="#0B0B09" />
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<meta name="theme-color" content="#0B0B09" />
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<title>Cipher — a Radical Party project</title>
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<title>Cipher — Free End-to-End Encrypted Messenger | Private Chat, Calls & Groups</title>
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<meta name="description" content="Cipher is a free, private, end-to-end encrypted messenger. Signal-grade encrypted 1:1 and group chats, voice & video calls, and disappearing messages — your keys never leave your device. No phone number required." />
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<meta name="keywords" content="encrypted messenger, end-to-end encryption, private messaging, secure chat, encrypted calls, disappearing messages, Signal alternative, WhatsApp alternative, E2E encryption, private group chat" />
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<meta name="author" content="Radical Party" />
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<meta name="robots" content="index, follow, max-image-preview:large" />
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<link rel="canonical" href="https://cipher.theradicalparty.com/" />
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<!-- Open Graph / social -->
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<meta property="og:type" content="website" />
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<meta property="og:site_name" content="Cipher" />
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<meta property="og:title" content="Cipher — Free End-to-End Encrypted Messenger" />
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<meta property="og:description" content="Private, end-to-end encrypted chats, groups, and voice & video calls. Your keys never leave your device. No phone number required." />
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<meta property="og:url" content="https://cipher.theradicalparty.com/" />
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<meta property="og:image" content="https://cipher.theradicalparty.com/icons/icon.svg" />
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<meta name="twitter:card" content="summary_large_image" />
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<meta name="twitter:title" content="Cipher — Free End-to-End Encrypted Messenger" />
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<meta name="twitter:description" content="Private, end-to-end encrypted chats, groups, and voice & video calls. Your keys never leave your device." />
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<meta name="twitter:image" content="https://cipher.theradicalparty.com/icons/icon.svg" />
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<!-- Structured data: helps Google understand this is a messaging web app -->
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<script type="application/ld+json">
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{
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"@context": "https://schema.org",
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"@type": "WebApplication",
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"name": "Cipher",
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"url": "https://cipher.theradicalparty.com/",
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"applicationCategory": "CommunicationApplication",
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"operatingSystem": "Web, iOS, Android, Windows, macOS, Linux",
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"browserRequirements": "Requires JavaScript. Requires a modern browser.",
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"description": "Cipher is a free, end-to-end encrypted messenger with private 1:1 and group chats, encrypted voice and video calls, and disappearing messages. Private keys are generated on-device and never sent to the server.",
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"isAccessibleForFree": true,
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"offers": { "@type": "Offer", "price": "0", "priceCurrency": "USD" },
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"featureList": [
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"End-to-end encryption (Signal Protocol)",
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"Private one-to-one and group chats",
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"Encrypted voice and video calls",
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"Disappearing messages",
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"Read receipts",
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"Group invite links",
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"Multi-device with QR linking",
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"No phone number required"
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],
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"publisher": { "@type": "Organization", "name": "Radical Party" }
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}
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</script>
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<link rel="manifest" href="/manifest.webmanifest" />
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<link rel="manifest" href="/manifest.webmanifest" />
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<link rel="icon" href="/icons/icon.svg" type="image/svg+xml" />
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<link rel="icon" href="/icons/icon.svg" type="image/svg+xml" />
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<link rel="apple-touch-icon" href="/icons/icon.svg" />
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<link rel="apple-touch-icon" href="/icons/icon.svg" />
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</style>
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</style>
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</head>
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</head>
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<body>
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<body>
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<div id="app"></div>
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<div id="app">
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<!-- Server-visible content for crawlers / no-JS. The real app hydrates over this. -->
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<noscript>
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<h1>Cipher — Free End-to-End Encrypted Messenger</h1>
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<p>Cipher is a free, private messenger with end-to-end encryption built on the
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Signal Protocol. Chat one-to-one or in groups, make encrypted voice and video
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calls, and send disappearing messages. Your private keys are generated on your
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device and never leave it — the server only ever relays ciphertext.</p>
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<h2>Features</h2>
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<ul>
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<li>End-to-end encrypted 1:1 and group chats</li>
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<li>Encrypted voice and video calls</li>
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<li>Disappearing messages and read receipts</li>
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<li>Shareable group invite links</li>
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<li>Multi-device sync with QR linking</li>
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<li>No phone number required</li>
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</ul>
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<p>Cipher requires JavaScript. Please enable it to sign in or create an account.</p>
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</noscript>
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</div>
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<script type="module" src="/js/app.js"></script>
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<script type="module" src="/js/app.js"></script>
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</body>
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</body>
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</html>
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</html>
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7
public/robots.txt
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7
public/robots.txt
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# Cipher — allow crawling of the public app shell; keep the API out of the index.
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# JS/CSS are intentionally crawlable so Google can render the single-page app.
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User-agent: *
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Allow: /
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Disallow: /api/
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Sitemap: https://cipher.theradicalparty.com/sitemap.xml
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9
public/sitemap.xml
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9
public/sitemap.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
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<url>
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<loc>https://cipher.theradicalparty.com/</loc>
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<lastmod>2026-07-22</lastmod>
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<changefreq>weekly</changefreq>
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<priority>1.0</priority>
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</url>
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</urlset>
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// Service worker: offline app shell + Web Push wake-up.
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// Service worker: offline app shell + Web Push wake-up.
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// It never touches message plaintext — decryption happens only in the page.
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// It never touches message plaintext — decryption happens only in the page.
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const CACHE = "cipher-v10";
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const CACHE = "cipher-v11";
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const SHELL = [
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const SHELL = [
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"/",
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"/",
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"/index.html",
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"/index.html",
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