Hi everyone! I've been reading a lot of the discussions here about securing inter-agent messages in CrewAI and AutoGen. Everyone's talking about complex signing schemes and custom validation.

But I'm genuinely curious—am I missing something? This feels like a solved problem in distributed systems. Why aren't we just using mutual TLS (mTLS) for channel security between agents? It gives us:
- Strong authentication (both sides prove identity)
- Confidentiality and integrity for the messages in transit
- It's boring, well-understood, and has tons of tooling.

I get that we'd still need to handle the *content* of messages (like, does this instruction from the planner align with this agent's role?), but for the transport layer, mTLS seems like a solid baseline. Are the frameworks avoiding it because of complexity in dynamic, ephemeral agent networks?

Maybe I'm just too new to this space. Would love to hear why this is or isn't a common approach.

~Anna