Implements a simplified Signal Protocol-style end-to-end encryption scheme for messaging, covering key exchange, forward secrecy, and the core cryptographic components so no server or intermediary can decrypt messages. Use when designing or building E2EE messaging, or evaluating forward-secrecy and key-management tradeoffs for a messaging system.
Install
npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-end-to-end-encryption-for-messagingnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-end-to-end-encryption-for-messaging -a claude-code -gnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-end-to-end-encryption-for-messaging -a codex -ggemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/implementing-end-to-end-encryption-for-messaginggh skill install mukul975/Anthropic-Cybersecurity-Skills implementing-end-to-end-encryption-for-messaginggit clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills /tmp/mukul975__Anthropic-Cybersecurity-Skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/implementing-end-to-end-encryption-for-messaging ~/.claude/skills/implementing-end-to-end-encryption-for-messaging # Claude Code
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/implementing-end-to-end-encryption-for-messaging ~/.agents/skills/implementing-end-to-end-encryption-for-messaging # Codex, Cursor, Gemini CLI, Copilot, OpenCode