Cisco announced plans to acquire Astrix Security, a startup specializing in securing non-human identities like API keys and OAuth tokens, for a reported $400 million. The acquisition addresses growing security concerns around AI agents and machine-to-machine access, as these automated identities rapidly expand the enterprise attack surface. Cisco plans to integrate Astrix's technology, which discovers and governs non-human identities and detects threats like compromised credentials and rogue agent behavior, into its broader security platform including Duo IAM.