Category 2 of 9

# Identify Who is this agent? Who is this site?

Classic-web analog: TLS certificate, WHOIS

How an agent proves who it is to a site, and how a site or another agent proves who it is back.

- [Agent Identity Protocol (AIP)](/protocols/aip/) AIP

- [Agent Name Service v2 (ANS)](/protocols/ans/) ANS

- [AI Agent Authentication and Authorization (AIMS)](/protocols/aiagent-auth/) AIMS

- [ERC-8004: Trustless Agents](/protocols/erc-8004/) ERC-8004

- [SPIFFE (Secure Production Identity Framework for Everyone)](/protocols/spiffe/) SPIFFE

- [Visa Trusted Agent Protocol](/protocols/tap/) TAP

- [Workload Identity in Multi System Environments (WIMSE) Architecture](/protocols/wimse/) WIMSE

- Web Bot Auth family [HTTP Message Signatures](/protocols/http-message-signatures/)
- [Signature Agent Card (Web Bot Auth registry)](/protocols/web-bot-auth-signature-agent-card/)
- [Web Bot Auth HTTP Message Signatures](/protocols/webbotauth/)