There is no CABF or root program rule preventing public CAs from implementing new requirements earlier than their assigned due dates. We discuss reasons to implement a rule early and how early it should be.
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It is surprising that we continue to see root expirations occur at the most inopportune times. Weekends, public holidays, even New Year's Eve. In this episode we have simple advice to anybody setting up a new root, which is "look at a calendar."
SSL hasn't been a standard in use for nearly thirty years, but we still use the word. We discuss why that is, what else we might say, and the expected effect of Merkle Tree Certificates (MTC) on our technical vocabulary.
With the upcoming deprecation of client authentication using publicly trusted TLS certificates, we go over the common use cases for these certificates. We discuss the reasons public trust is often chosen and how to transition away from it.
Anthropic recently announced that Mythos has found mathematical weakness in the core algorithm for the third-round NIST PQC candidate HAWK, effectively halving its effective key strength. Mythos also developed a faster attack on a round-reduced version of AES-128. These are not implementation attacks but mathematical attacks on the core cryptography. We discuss the massive implications of these developments.
A newly revealed flaw in Active Directory Certificate Services (AD CS) allows an attacker to improperly obtain cryptographic credentials for an agent. We discuss the implications that this flaw Certighost (pronounced sert-uh-GHOST) has for agentic AI at large.
Because of a change in the drop-dead date, we have observed confusion about the timeline for deprecation of client authentication and mTLS for public TLS certificates. This is an inflexible deadline, and enterprises that are not ready risk outage. In this episode we spell out these dates very clearly.
In our series on digital identity for AI agents, we discuss FAPI 2.0 as an option.
In our ongoing series on digital identity for agents, we have previous discussed use of certificates for authentication. In this episode we describe how cryptographic proof of possession can enable secure authentication using tokens.
We survey different strategies for securely authenticating agentic AI, including certificates and SPIFFE. We discuss Zero Trust and the Principle of Least Privileges as applied to agents.
Anthropic has announced its intentions to support SPIFFE/SPIRE with the SPIRE server rooted in an "upstream authority," which will require a root private CA rather than allowing self-attestation for agentic AI.
In our episode 640 we defined SPIFFE, which provides digital identity for agentic workloads. In this episode we explain SPIRE (SPIFFE Runtime Environment), the SPIFFE certificate provisioning protocol.