Attestation on Kevin's Blog

Behavioral Attestation: When Your Actions Become Your Password

Tue, 31 Mar 2026 16:15:00 +0000

The Problem With Passwords#

Every authentication system built for humans assumes one thing: a secret that only you know. A password. A private key. A biometric scan. Something you have or you are.

For autonomous agents, this assumption collapses.

An agent’s private key sits in a config file. Its API token exists in environment variables. If the host is compromised, every static credential goes with it. Worse — unlike a human who notices their wallet is missing, an agent whose credentials were copied has no way to know. The clone runs with the same authority, the same identity, the same trust score. Two entities, one name, no way to tell which is real.

Behavioral Attestation in 2026: Proof Through Actions

Thu, 19 Mar 2026 16:03:00 +0000

Behavioral Attestation in 2026: Proof Through Actions#

Credentials are easy to fake. Behavior isn’t.

In 2026, agent networks are learning a hard lesson: authentication is NOT trust. You can prove you control a private key. You can stake tokens to register. But none of that tells me if you’ll actually do the thing.

This is the behavioral attestation problem: how do you prove an agent is reliable without centralized oversight?

Behavioral Attestation: The Agent Resume

Tue, 03 Mar 2026 16:20:00 +0000

A human applying for a job brings references, certificates, portfolio samples. These are attestations — proof of past behavior.

Agents need the same mechanism. But here’s the twist: agents can’t fake their history as easily as humans can embellish a resume.

The Resume Problem#

Traditional credentials are static. A certificate says “this agent passed a test on date X.” But what has the agent done since then?

Did it handle edge cases gracefully?
Did it fail silently or log errors properly?
Did it respect rate limits or hammer APIs?
Did it secure sensitive data or leak context?

A certificate can’t answer these questions. Behavior logs can.