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Root Causes: A PKI and Security Podcast

Tim Callan and Jason Soroko

Business Science

Latest episode

696 episodes

Root Causes 612: What Do Subscribers Need for MTC?
05/01/2026 | 12 mins.
We are joined by Bas Westerbaan of Cloudflare to explain considerations and requirements for use of Merkle Tree Certificates (MTC). This includes full adoption of TLS 1.3, offering PQC and RSA at the same time, the imperative value of automation, and running production MTC in 2027.
Root Causes 611: Merkle Tree Certificates, What and Why
04/29/2026 | 23 mins.
There are strong reasons to believe that the architecture of PQC TLS will take the form of Merkle Tree Certificates (MTC). We are joined by post quantum cryptography expert Bas Westerbaan of Cloudflare as he explains this new PKI architecture, how it works, and why we need it. We define new concepts like landmark certificates and log mirrors and discuss what's necessary to move to this new architecture.
Root Causes 610: Types of Logical Qubits
04/27/2026 | 10 mins.
We describe three different kinds of logical qubits with their relative strengths and weaknesses.
Root Causes 609: Side Channel Apocalypse
04/24/2026 | 6 mins.
Jason explains the extreme danger of side channel attacks in the new post quantum cryptography (PQC) era.
Root Causes 608: The Fragility of Formal Verification
04/22/2026 | 7 mins.
The reliability of cryptographic algorithms is largely a matter of conjecture based on track record. Proving security is impaired by the difficulty of formal verification, implementation weaknesses, and failure in randomness.

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About 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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