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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EPISODE 456
Broadcast Date:
January 14, 202511 minutes
Podcasts Jan 14, 2025Root Causes 456: 2024 Lookback - Bugzilla Bloodbath
In this 2024 lookback episode, we give an overview of the firestorm of Bugzilla incidents that we refer to as the Bugzilla Bloodbath. The Bugzilla Bloodbath affected actions around the Entrust distrust, delayed revocation reform, 47-day SSL certificate maximum term, linting, and more.
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60 minutes
Webinars Jan 13, 20252025 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 455
Broadcast Date:
January 10, 202536 minutes
Podcasts Jan 10, 2025Root Causes 455: PQC Standardization in IETF
We talk with guest Sofia Celi of Brave Browser, who leads the IETF PQC standardization effort, about the process of setting standards for PQC-compatible digital certificates. We learn about expected timelines, hybrid strategies, the NIST PQC onramp's role, and more.
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EPISODE 453
Broadcast Date:
January 2, 202514 minutes
Podcasts Jan 02, 2025It Turns Out Monkeys Couldn't Type Shakespeare After All
The old adage states that a monkey in front of a keyboard, given enough time, could randomly type the works of Shakespeare. Apparently, someone ran the numbers and said not so much. We break it down and explain why we're discussing this on a PKI podcast.
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EPISODE 452
Broadcast Date:
December 30, 202411 minutes
Podcasts Dec 30, 2024Root Causes 452: 2024 Predictions Scorecard
We go over our predictions for 2024 and score our ability as prognosticators.
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EPISODE 450
Broadcast Date:
December 23, 202448 minutes
Podcasts Dec 23, 2024Root Causes 450: 2025 Predictions
We make our 2025 predictions. Topics include maximum certificate term, AI, post-quantum cryptography (PQC), deep fakes, and more.
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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.