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    Technology

    Root Causes: A PKI and Security Podcast

    Digital certificate industry veterans Tim Callan and Jason Soroko explore the issues surrounding digital identity, PKI, and cryptographic connections in today’s dynamic and evolving computing world. Best practices in digital certificates are continually under pressure from technology trends, new laws and regulations, cryptographic advances, and the evolution of our computing architectures to be more virtual, agile, ubiquitous, and cloud-based. Jason and Tim (and the occasional guest subject matter expert) will help you stay current on developments in this essential technology platform and to understand the whys and wherefores of popular Public Key Infrastructures.

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    Latest Episodes:
    Root Causes 648: Claude Mythos Discovers New HAWK and AES Attacks Aug 03, 2026
    Show notes

    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.

    Root Causes 647: AD CS "Certighost" Flaw Highlights Agentic Identity Risks Jul 31, 2026
    Show notes

    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.

    Root Causes 646: Clarifying the Dates for clientAuth Deprecation Jul 29, 2026
    Show notes

    Because of a change in the drop-dead date, we have observed confusion in 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.

    Root Causes 645: FAPI 2.0 Principles Jul 27, 2026
    Show notes

    In our series on digital identity for AI agents, we discuss FAPI 2.0 as an option.

    Root Causes 644: Cryptographically Bound Tokens Jul 24, 2026
    Show notes

    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.

    Root Causes 643: Certificates for Stronger Agent Authentication Jul 22, 2026
    Show notes

    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.

    Root Causes 642: Anthropic to Support SPIFFE/SPIRE Jul 20, 2026
    Show notes

    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.

    Root Causes 641: What Is SPIRE? Jul 17, 2026
    Show notes

    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.

    Root Causes 640: What is SPIFFE? Jul 15, 2026
    Show notes

    SPIFFE (Secure Production Identity Framework for Everyone) is a standard for digital identity for agentic workloads. In this episode we explain.

    Root Causes 639: Fighting Static API Key Spillage Is Like Fighting Gravity Jul 10, 2026
    Show notes

    Static API keys are a common security practice. In this episode we discuss the risk of these keys being revealed, including directly by the AIs that use them.

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