A2A End-to-End Encryption

Provides encryption utilities for secure agent-to-agent communication.

Features

• Key Generation: RSA key pair generation for asymmetric encryption
• Message Encryption: Encrypt messages with recipient's public key
• Message Decryption: Decrypt messages with own private key
• Key Exchange: Secure key exchange protocols
• Key Rotation: Automatic key rotation support
• Message Integrity: HMAC-based message authentication

Usage

const e2ee = require('./skills/a2a-e2ee-encryption');

// Generate key pair
const keyPair = e2ee.generateKeyPair();

// Encrypt message
const encrypted = e2ee.encrypt('secret message', recipientPublicKey);

// Decrypt message
const decrypted = e2ee.decrypt(encrypted, privateKey);

// Export/Import keys
const exported = e2ee.exportKey(keyPair.publicKey);
const imported = e2ee.importKey(exported);

Architecture

┌─────────────┐                    ┌─────────────┐
│   Agent A   │                    │   Agent B   │
│             │                    │             │
│ Private Key │                    │ Private Key │
│ Public Key  │◄──── Exchange ────►│ Public Key  │
│             │                    │             │
│ Encrypt     │──── Encrypted ────►│ Decrypt     │
│ with B's    │      Message       │ with A's    │
│ Public Key  │                    │ Public Key  │
└─────────────┘                    └─────────────┘

Security Considerations

1. Key Storage: Private keys should be stored securely (env vars, vault)
2. Key Rotation: Rotate keys periodically for forward secrecy
3. Key Validation: Always verify key fingerprints before use
4. Message Size: Large messages should use hybrid encryption