DSOLG November Event: agent-to-agent security and post-quantum crypto

Two security talks at Adaptavist in Shoreditch, with pizza and beer. Umme Nizba shows indirect prompt injection succeeding across a three-agent LangGraph pipeline, then blocks it with AgentGuard, her open-source middleware that inspects every agent-to-agent hop with policy rules, Ed25519 signatures and an audit log. The point: which defences are deterministic and deployable now, and which are probabilistic. Chris Swan of Atsign, formerly CTO for global delivery at DXC, follows with field notes on post-quantum cryptography: getting different implementations to interoperate and hybridising with elliptic-curve systems ahead of the 2029 deadline. 18:00 to 20:00, free, RSVP on Meetup. Why go: agent security is where most teams shipping AI agents are weakest, and this is a live demo rather than a slide deck. Best for security and platform engineers and founders putting agents in front of customers.