Featured Contributor
Tim Callan
Chief Compliance Officer at Sectigo
As Chief Experience Officer, Tim Callan leads efforts to optimize the customer journey across all aspects of the business. Tim has more than 20 years of experience as a strategic marketing and product leader for successful B2B software and SaaS companies, with 15 years of experience in the SSL and PKI technology spaces.
Tim Callan has over 20 years of experience in the SSL and PKI technology spaces. Tim leads Sectigo's conformance with industry and regulatory requirements including browser root programs, WebTrust, CA/Browser Forum, and more. Tim is instrumental in driving initiatives to improve certificate agility and successful issuance. A founding member of the CA/Browser Forum and current vice-chair for one of its working groups, Tim is creator and co-host of Root Causes: A PKI and Security Podcast, the world’s most popular podcast dedicated to digital certificates. With 400+ episodes published, Tim is on the forefront of explaining trends that will be essential to the IT professionals, including shortening certificate lifespans and the coming change to post-quantum cryptography.
Recent Posts from Tim Callan
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Webinars Upcoming2025 cryptography trends: Challenges & opportunities for IT teams
Prepare for 2025 PKI challenges: Quantum threats, TLS changes, and automation trends to boost crypto-agility and overcome IT resource limits.
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EPISODE 449
Broadcast Date:
December 18, 202423 minutes
Podcasts Dec 18, 2024Root Causes 449: What Is a Quantum-safe HSM?
Repeat guest Bruno Coulliard of Crypto4A joins us to define a quantum-safe (or PQC enabled) hardware security module (HSM).
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EPISODE 448
Broadcast Date:
December 17, 202426 minutes
Podcasts Dec 17, 2024Root Causes 448: The Privilege of Being a Public CA
We go over Tim's September 2024 keynote speech at ENISA CA Day, "The Privilege of Being a Public CA."
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EPISODE 447
Broadcast Date:
December 13, 202414 minutes
Podcasts Dec 13, 2024Root Causes 447: NIST Deprecates RSA-2048 and ECC 256
As part of its post-quantum cryptography (PQC) initiative NIST has released a draft deprecating RSA-2048 and ECC 256 by 2030 and disallowing them by 2035. We get into the details.
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EPISODE 446
Broadcast Date:
December 12, 202413 minutes
Podcasts Dec 12, 2024Root Causes 446: Sectigo Assumes Five CABF Offices
Tim has stepped into the position of vice-chair of the CA/Browse Forum, and Sectigo now holds five chair or vice-chair positions in that body. We explain how leadership is chosen, the offices Sectigo holds today, and some of our vision for CABF in the next two years.
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EPISODE 445
Broadcast Date:
December 9, 202428 minutes
Podcasts Dec 09, 2024Root Causes 445: Seven Reasons to Shorten Certificate Lifespans
We take a deep dive into the seven reasons shorter certificate lifespans are better.
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EPISODE 444
Broadcast Date:
December 5, 202419 minutes
Podcasts Dec 05, 2024Root Causes 444: What Happens to the WebPKI if Google Sells Chrome?
We discuss how a potential break of Chrome from Google would affect the WebPKI. We look at product changes, resourcing, post-quantum cryptography (PQC), innovation, moonshot initiatives, and other public CAs.
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EPISODE 443
Broadcast Date:
December 2, 202413 minutes
Podcasts Dec 02, 2024Root Causes 443: Is MSCA Going Away?
In this episode we discuss the challenges for enterprises using Microsoft Active Directory Certificate Services (ADCS).
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EPISODE 442
Broadcast Date:
November 25, 202422 minutes
Podcasts Nov 25, 2024Root Causes 442: Apple Proposal to Reduce SSL Lifespan Updated
Apple has published an updated draft to its proposal for shortening the lifespan of SSL certificates, including a final term of 47 rather than 45 days.