Secure Coding Practices for A2A Applications

This repository provides reference code snippets of secure coding patterns for Google 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.

Disclaimer: These examples are provided for educational and reference purposes only. No warranty is provided. The code is not fully tested and is not intended for use in production systems. Each file demonstrates a security pattern or mitigation technique, but may require adaptation and further testing for your specific environment.

Secure Coding Examples

Original 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.

A2A+ CrewAI Secure Examples

The following examples demonstrate the mitigation strategy using CrewAI constructs and Google A2A:

1. Input Validation & Sanitization (input_validation_a2a_crew.py)
2. Output Verification & Content Filtering (output_verification_a2a_crew.py)
3. Strong Authentication & Authorization (authentication_authorization_a2a_crew.py)
4. Rate Limiting & Monitoring (rate_limiting_a2a_crew.py)
5. Schema Validation (schema_validation_a2a_crew.py)
6. Secure State & Cache Management (secure_cache_a2a_crew.py)
7. Logging & Observability (logging_observability_a2a_crew.py)
8. Continuous Auditing & Credential Hygiene (credential_hygiene_a2a_crew.py)

Each file contains an example usage. Adapt these patterns to your own A2A systems for improved security.