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implementing-end-to-end-encryption-for-messaging

85 / 100 · Low risk

Fine to try.

By mukul975/Anthropic-Cybersecurity-Skills (GitHub) · security · 35,906 stars · scanned at commit 54a7988

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.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'implementing-end-to-end-encryption-for-messaging' ] || [ -L ~/.agents/skills/'implementing-end-to-end-encryption-for-messaging' ]; then echo 'A skill folder named implementing-end-to-end-encryption-for-messaging already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/mukul975/Anthropic-Cybersecurity-Skills' "$d" && git -C "$d" checkout --quiet '54a798831d2266a3ca61ce68a7acb80b81160d57' -- 'skills/implementing-end-to-end-encryption-for-messaging' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/implementing-end-to-end-encryption-for-messaging' ~/.agents/skills/'implementing-end-to-end-encryption-for-messaging' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'implementing-end-to-end-encryption-for-messaging' ~/.claude/skills/'implementing-end-to-end-encryption-for-messaging' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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