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Artwork for Root Causes: A PKI and Security Podcast

Root Causes: A PKI and Security Podcast

Tim Callan and Jason Soroko
Post-Quantum Cryptography
Public Key Infrastructure
Quantum Computing
Cryptography
Digital Certificates
Cybersecurity
Artificial Intelligence
Web PKI
Certificate Authority
PKI
Domain Control Validation
Google
Certificate Lifecycle Management
NIST
RSA
Merkle Tree Certificates
PQC
Entropy
Digital Identity
Encryption

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 mo... more

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Artwork for Root Causes: A PKI and Security Podcast

Latest Episodes

Jason uses a quantum simulator to show us how a cryptographically relevant quantum comptuer (CRQC) would employ Shor's algorithm to attack RSA. Part one of two, with guest Bruno Coulliard.

In this second of two episodes, Jason walks guest Bruno Coulliard and me through his real-world experience building quantum simulators, including some of the lessons he learned.

In this first of two episodes, Jason walks guest Bruno Coulliard and me through his real-world experience building quantum simulators, including some of the lessons he learned.

Repeat guest Bruno Coulliard of Crypto4A joins us to discuss the accelerating pace of change in digital technology, which is going at a rate unprecedented in human history. How do we as people adjust to the hyperspeed of today's technology landscape?... more

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Recent Guests

Dustin Moody
Guest from NIST, cryptography researcher
National Institute of Standards and Technology (NIST)
Episode: Root Causes 636: The Future of Crypto Agility
Bas Westerbaan
Cloudflare technologist and cryptography expert
Cloudflare
Episode: Root Causes 635: Do We Need to Get Rid of ECC?
Sam Jaques
University of Waterloo researcher
University of Waterloo
Episode: Root Causes 629: Does the Evidence Support Moving PQC Deadlines to 2029?
Bruno Culliard
Listener and Contributor
Episode: Root Causes 572: Quality of Entropy
Chris McGrath
Senior Advisor to Enterprise and Governments Clients on Cybersecurity and Regulation
Episode: Root Causes 568: Upping Your Certificate Game for Better Security
Johannes Sedlmeir
Acting professor at the University of Munster
University of Munster
Episode: Root Causes 546: New Research Codifies Arguments for and Against QWACs
Pol Holzmer
Doctor researcher at the University of Luxembourg
University of Luxembourg
Episode: Root Causes 546: New Research Codifies Arguments for and Against QWACs
Sofia Celi
Cryptographer for the Brave Browser and contributor to NIST cryptography competitions.
Brave Browser
Episode: Root Causes 497: PQC Update with Sofia Celi
Dmitry Sharkov
Technical Architect
Sigtigo
Episode: Root Causes 485: What Is Open MPIC?

Hosts

Tim Callan
Host of Root Causes: A PKI and Security Podcast, PKI industry veteran
Jason Soroko
Host of Root Causes: A PKI and Security Podcast, PKI industry veteran

Reviews

5.0 out of 5 stars from 45 ratings
  • Keeping current with Root Causes

    Thank you for providing “key” information on Pki and digital identity topics. It is an awesome way to stay current and learn how to protect digital assets in a constantly changing landscape.

    Apple Podcasts
    5
    PKI Princess
    United States5 years ago
  • Thank you so much

    Been in the systems engineering space for 10 years and I’ve continued to struggle with PKI and CA. The concept I get sure but execution in the organizations I’ve been apart of always looked like some disgusting, unscalable sidecar process that we all just had to do. This podcast has slowly filled those gaps in helping me understand soup to nuts what it’s all about, the risks, and what right looks like. Thanks guys! Love the show.

    Apple Podcasts
    5
    ModernLifeIsWar
    United States6 years ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Listeners appreciate the candid discussions about modern authentication and zero-trust considerations.
Excellent practical insights for PKI governance and certificate lifecycle management.
Positive remarks about staying current in a rapidly evolving field.
Clear explanation of complex topics; helpful for bridging theory and real-world implementation.

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Talking Points

Recent interactions between the hosts and their guests.

Root Causes 636: The Future of Crypto Agility
Q: What happens after the initial PQC on-ramp? Will there be more contests and ongoing research, or is the era of new standards behind us?
The expectation is that research will continue and new attacks or advancements will necessitate further transitions, with an emphasis on crypto agility to make future changes easier and less disruptive.
Root Causes 620: Will NIST Update Its PQC Timelines?
Q: Should we expect NIST to re-evaluate its dates in light of new research and industry pressure?
Moody indicates that while the core 2035 deadline remains likely, NIST will adjust guidance if circumstances warrant, especially for rapidly migratable use cases like cloud deployments, but emphasizes coordination with federal agencies and maintaining a practical, staged approach.
Root Causes 618: MTC and Private PKI
Q: What are the practical downsides of Merkle Tree Certificates for private PKI, and when might they not be worth it?
Size and landmark management are core concerns; for some operators with small, light-weight devices or limited trusted channels, sticking with traditional approaches might be simpler unless the benefits of reduced signing operations or improved downgrades handling justify the complexity.
Root Causes 618: MTC and Private PKI
Q: If I enforce 100% PQC compliance and require that non-PQC entities can't connect, is MTC really necessary?
You can deploy plain PQC as is, but many environments benefit from MTC when there are large signature workloads or when you need the efficiency of signing a tree head that represents many certificates at once.
Root Causes 613: Status of the NIST PQC Contests
Q: What are the main criteria used to evaluate PQC algorithms?
Security against classical and quantum attacks, potential for a formal security proof, performance metrics (key sizes, ciphertext/signature sizes, speed), and implementation characteristics including side-channel resistance and IP concerns.

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Frequently Asked Questions About Root Causes: A PKI and Security Podcast

What is Root Causes: A PKI and Security Podcast about and what kind of topics does it cover?

Two industry veterans examine digital identity, PKI, and cryptographic trust across real-world deployments, exploring topics like certificate-based authentication, mutual TLS, and evolving governance as public-trust roots shift. Episodes frequently dissect practical workflows (VPNs, Wi‑Fi onboarding, guest access), security architecture (private CAs, SPIFFE/SPIRE, zero-trust), and the balance between policy, standards, and agile implementation. A standout angle is the emphasis on practical governance and interoperability—using open standards to harden workloads and machines, not just humans, and the willingness to challenge long-standing trust models for better security and operational efficiency.

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1. Dwarkesh Podcast
2. The AI Daily Brief: Artificial Intelligence News and Analysis
3. Hacking Humans
4. The Prof G Pod with Scott Galloway
5. Pivot

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Root Causes: A PKI and Security Podcast launched 8 years ago and published 677 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on Root Causes: A PKI and Security Podcast?

Recent guests on Root Causes: A PKI and Security Podcast include:

1. Dustin Moody
2. Bas Westerbaan
3. Sam Jaques
4. Bruno Culliard
5. Chris McGrath
6. Johannes Sedlmeir
7. Pol Holzmer
8. Sofia Celi

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