Root Causes: A PKI and Security Podcast

Latest Episodes:

Root Causes 598: Why Johnny Can't authN in OT Mar 30, 2026

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A recent CISA report declares that the nation's OT infrastructure is incapable of keeping up with the crypto agility and certificate management needs that modern security demands. We examine this finding.

Root Causes 597: If You Don't Hold the Keys, You Don't Hold the Subpoenas Mar 27, 2026

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Microsoft has publicly stated that it will hand over Bitlocker keys to US law enforcement agencies without requiring a subpoena or court order. These keys can be held by users rather than Microsoft, at their option. We dive into this topic.

Root Causes 596: CLM and Operational Uptime Mar 25, 2026

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We usually think of Certificate Lifecycle Management (CLM) as a security category. But we could equally well categorize it as an operations category that enables uptime. In this episode we make our case.

Root Causes 595: What Is a Digital Parasite? Mar 23, 2026

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We introduce the concept of a "digital parasite," explaining why this attack philosophy appears to be on the rise.

Root Causes 594: Google's Five PQC Recommendations for Policy Makers Mar 18, 2026

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In a recent blog post Google made five recommendations for policy makers. We walk down the list.

Root Causes 593: New PQC Guidance from CISA Mar 16, 2026

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CISA (Cybersecurity and Infrastructure Security Agency) has released new guidance about post-quantum cryptography in critical infrastructure, including some very sobering warnings. We go into the details.

Root Causes 592: When a CAA Record Outlives the CA Mar 13, 2026

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CAA records exist to restrict issuing CAs for a given domain to as few as one CA. But what happens when the CAA record outlives the CA to which it restricts issuance? Join us to find out.

Root Causes 591: Client Authentication Deprecation Date Moves Out Mar 11, 2026

Show notes

Chrome's deadline for deprecation of the clientAuth EKU and mTLS in public certificates has moved out. We give you the what, when, and why.

Root Causes 590: The Size of the CA Is Not the Size of the Risk Mar 10, 2026

Show notes

It would be easy to believe that the amount of risk posed to the WebPKI by any individual public CA is somehow proportional to the number of active certificates that CA has. This is false, however. In this episode we address this misconception.

Root Causes 589: Is a Cryptographically Relevant Quantum Computer Economically Viable? Mar 06, 2026

Show notes

We recently heard the argument that it's simply too expensive to develop a cryptographically relevant quantum computer. We vehemently disagree. In this episode we explain why.

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