{"slug": "ekko-post-quantum-e2ee-for-mainstream-messengers", "title": "Ekko: Post-Quantum E2EE for Mainstream Messengers", "summary": "Ekko, a browser extension developed by an unnamed team, layers post-quantum end-to-end encryption on top of mainstream messengers including WhatsApp Web, Instagram, Telegram Web, and Messenger, using a hybrid key exchange of X25519 and ML-KEM-768 with XChaCha20-Poly1305 symmetric encryption. The extension, currently available as a Chromium build with experimental Firefox and Safari versions, generates and stores private keys locally on the device rather than on service provider servers, and offers a self-hostable public-key directory for full control.", "body_md": "# Ekko: Post-Quantum E2EE for Mainstream Messengers\n\nI've been looking into Ekko as a way to bypass this migration headache. Instead of forcing a platform switch, it functions as a browser extension that layers post-quantum end-to-end encryption (E2EE) directly on top of the messengers people already use. Essentially, you keep your existing accounts, but the content is encrypted before it ever hits the company's servers.\n\nFrom a technical perspective, it's using a hybrid approach to stay ahead of future decryption threats:\n\n**Key Exchange:** Hybrid X25519 + ML-KEM-768**Symmetric Encryption:** XChaCha20-Poly1305**Key Management:** Private keys are generated and stored locally on the device, not by the service provider.\n\nThe current deployment state is a Chromium extension, with experimental builds for Firefox and Safari. It supports WhatsApp Web, Instagram, Telegram Web, and Messenger. For those who want full control, there's a self-hostable public-key directory.\n\nIf you're setting this up for a team, the workflow is basically:\n\n1. Install the extension.\n\n2. Claim a handle to simplify public key exchange.\n\n3. Chat through the web version of your preferred messenger.\n\nThe source code is available for a deep dive into the protocol:\n\n```\nhttps://github.com/useekko/ekko-core\n```\n\nIt's a clever workaround for the \"adoption gap\" in secure communications. Rather than fighting the ecosystem, it just upgrades the security of the existing one.\n\n[Next Buying a high-end phone in India is a massive investment →](/en/threads/2558/)", "url": "https://wpnews.pro/news/ekko-post-quantum-e2ee-for-mainstream-messengers", "canonical_source": "https://promptcube3.com/en/threads/2580/", "published_at": "2026-07-23 22:46:04+00:00", "updated_at": "2026-07-24 07:05:34.768156+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-safety", "ai-policy"], "entities": ["Ekko", "WhatsApp Web", "Instagram", "Telegram Web", "Messenger", "Chromium", "Firefox", "Safari"], "alternates": {"html": "https://wpnews.pro/news/ekko-post-quantum-e2ee-for-mainstream-messengers", "markdown": "https://wpnews.pro/news/ekko-post-quantum-e2ee-for-mainstream-messengers.md", "text": "https://wpnews.pro/news/ekko-post-quantum-e2ee-for-mainstream-messengers.txt", "jsonld": "https://wpnews.pro/news/ekko-post-quantum-e2ee-for-mainstream-messengers.jsonld"}}