age (and rage) — Modern File Encryption

Deep Knowledge: Use mcp__documentation__fetch_docs with technology: age.

What age Is

age (pronounced "ah-gay" 🦗) is a simple, modern, secure file encryption tool. Spec at https://age-encryption.org. Implementations:

• Go reference — filippo.io/age (CLI: age)
• Rust port — str4d/rage (CLI: rage, rage-keygen)
• JS — age-encryption npm package

Properties:

• One-line API for encrypt/decrypt
• X25519-based public-key recipients (32-byte short string age1...)
• Scrypt-based passphrase recipients
• SSH key recipients (Ed25519 and RSA) — encrypt to existing GitHub ~/.ssh/authorized_keys
• Plugin system: YubiKey, Secure Enclave, TPM, age-keyring (passwordstore)
• Streaming format (constant memory, supports very large files)
• Authenticated encryption (ChaCha20-Poly1305 chunks + HMAC)