Why every AI agent needs a cryptographic identity

If you've put an AI agent anywhere near production systems, you've probably already hit this problem: the agent can do things , but you can't reliably answer who did what, under which authority, and whether it should have been allowed in the first place . That gets painful fast. An agent opens a PR, rotates a secret, queries customer data, or triggers a deployment. Later, someone asks: Was that action approved? Which user or service delegated permission? Was this the same agent instance as yesterday, or a spoofed one with the same display name? As AI agents move from chat demos to real workflows, cryptographic identity stops being a nice-to-have . It becomes the thing that makes authorization, delegation, auditability, and safe automation possible. The core problem: agents act like users, but we identify them like scripts Most teams start with shared API keys, service accounts with long-lived credentials, or reused user tokens. These work for prototypes. They break in production becaus