a2a-secure-coding-examples

# Secure Coding Practices for A2A Applications This repository provides reference implementations of secure coding patterns for Agent-to-Agent (A2A) applications, following the MAESTRO framework. Each example demonstrates how to mitigate common security threats in multi-agent systems. The code snippets are organized by security topic and can be used as a starting point for your own implementation. ## Secure Coding Examples 1. **Input Validation & Sanitization** (`input_validation.py`) - Prevents message schema violations and prompt injection by validating and sanitizing message parts. 2. **Output Verification & Content Filtering** (`output_verification.py`) - Filters artifacts to prevent leaking sensitive or forbidden content. 3. **Strong Authentication & Authorization** (`authentication_authorization.py`) - Uses JWT and environment-based credentials to ensure agent identity and secure operations. 4. **Rate Limiting & Monitoring** (`rate_limiting.py`) - Enforces rate limits to protect against DoS and abuse. 5. **Schema Validation** (`schema_validation.py`) - Validates message schemas using Pydantic. 6. **Secure State & Cache Management** (`secure_cache.py`) - Demonstrates secure, thread-safe cache usage for artifacts and credentials. 7. **Logging & Observability** (`logging_observability.py`) - Provides safe logging practices to prevent log injection and improve auditability. 8. **Continuous Auditing & Credential Hygiene** (`credential_hygiene.py`) - Shows how to rotate credentials and maintain secure authentication info. Each file contains example usage. Adapt these patterns to your own A2A systems for improved security.