Implement encrypted agent-to-agent communication

Co-authored-by: theCyberTech <84775494+theCyberTech@users.noreply.github.com>

examples/encrypted_communication_example.py

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+#!/usr/bin/env python3
+"""
+Example demonstrating encrypted agent-to-agent communication in CrewAI.
+
+This example shows how to:
+1. Enable encrypted communication for agents
+2. Use existing agent tools with encryption
+3. Verify that communication is encrypted between agents
+"""
+
+from crewai import Agent, Crew, Task
+from crewai.security import SecurityConfig
+from crewai.tools.agent_tools.ask_question_tool import AskQuestionTool
+
+
+def main():
+    """Demonstrate encrypted agent communication."""
+    print("🔒 CrewAI Encrypted Agent Communication Example")
+    print("=" * 50)
+    
+    # Create agents with encrypted communication enabled
+    print("Creating agents with encrypted communication...")
+    
+    # Researcher agent with encryption enabled
+    researcher = Agent(
+        role="Senior Research Analyst",
+        goal="Conduct thorough research and analysis",
+        backstory="You are an expert researcher with years of experience in data analysis.",
+        security_config=SecurityConfig(encrypted_communication=True),
+        verbose=True
+    )
+    
+    # Writer agent with encryption enabled
+    writer = Agent(
+        role="Content Writer", 
+        goal="Create compelling content based on research",
+        backstory="You are a skilled writer who transforms complex research into engaging content.",
+        security_config=SecurityConfig(encrypted_communication=True),
+        verbose=True
+    )
+    
+    print(f"✓ Researcher agent created with encryption: {researcher.security_config.encrypted_communication}")
+    print(f"✓ Writer agent created with encryption: {writer.security_config.encrypted_communication}")
+    print(f"✓ Researcher fingerprint: {researcher.security_config.fingerprint.uuid_str[:8]}...")
+    print(f"✓ Writer fingerprint: {writer.security_config.fingerprint.uuid_str[:8]}...")
+    
+    # Create agent tools - these will automatically use encryption when available
+    agent_tools = [
+        AskQuestionTool(
+            agents=[researcher, writer],
+            description="Tool for asking questions to coworkers with encrypted communication support"
+        )
+    ]
+    
+    print(f"✓ Agent tools created with encryption capability")
+    
+    # Create tasks that will involve encrypted communication
+    research_task = Task(
+        description="Research the latest trends in artificial intelligence and machine learning",
+        expected_output="A comprehensive research report on AI/ML trends",
+        agent=researcher
+    )
+    
+    writing_task = Task(
+        description="Ask the researcher about their findings and write a blog post",
+        expected_output="An engaging blog post about AI trends", 
+        agent=writer,
+        tools=agent_tools
+    )
+    
+    # Create crew with both agents
+    crew = Crew(
+        agents=[researcher, writer],
+        tasks=[research_task, writing_task],
+        verbose=True
+    )
+    
+    print("\n🚀 Starting crew execution with encrypted communication...")
+    print("Note: Agent communications will be automatically encrypted!")
+    
+    # Execute the crew - agent tools will use encryption automatically
+    try:
+        result = crew.kickoff()
+        print("\n✅ Crew execution completed successfully!")
+        print("=" * 50)
+        print("RESULT:")
+        print(result)
+        
+    except Exception as e:
+        print(f"\n❌ Execution failed: {e}")
+        print("This is expected in a demo environment without proper LLM configuration")
+    
+    print("\n🔍 Key Features Demonstrated:")
+    print("- Agents created with SecurityConfig(encrypted_communication=True)")
+    print("- Unique fingerprints generated for each agent")
+    print("- Agent tools automatically detect encryption capability")
+    print("- Communication payloads encrypted using Fernet symmetric encryption")
+    print("- Keys derived from agent fingerprints for secure communication")
+    print("- Backward compatibility maintained - non-encrypted agents still work")
+
+
+if __name__ == "__main__":
+    main()