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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A live webinar hosted by Sectigo.
60 minutes
Webinars UpcomingWhy 47-day certificates matter for a quantum-ready enterprise
Join us on July 22, where our industry experts will explore the evolving quantum threat landscape and its implications for digital trust.
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EPISODE 511
Broadcast Date:
July 5, 202516 minutes
Podcasts Jul 05, 2025Root Causes 511: The GoML Root Store
We follow up on our discussion of the Get off My Lawn (GoTM) browser with Jason's adventure in creating his own custom root store.
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EPISODE 509
Broadcast Date:
June 25, 20258 minutes
Podcasts Jun 25, 2025Root Causes 509: What Is a CPS?
We define CPS (Certificate Practices Statement) and explain the role it plays in both the WebPKI and private CAs.
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Prepare now: 200-day SSL/TLS certificates effective march 2026
Blog Post from Sectigo
Blog Posts Jun 24, 2025SSL certs drop to 200 days in 2026, pushing automation as essential for security, compliance, and post-quantum readiness.
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60 minutes
Webinars Jun 24, 2025Why choosing a reputable CA is crucial in a 47-day world
Join our webinar to explore why selecting a reputable CA is more critical than ever to avoiding downtime and keeping your business compliant.
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EPISODE 508
Broadcast Date:
June 23, 202518 minutes
Podcasts Jun 23, 2025Root Causes 508: What Is Code Vibing?
"Code vibing" is using generative AI to create or improve working code. We share Jason's adventure using code vibing to create his own web browser.
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EPISODE 507
Broadcast Date:
June 19, 202510 minutes
Podcasts Jun 19, 2025Root Causes 507: First Distrust of 2025
The first CA distrust event of 2025 comes with two simultaneous CA distrusts. We give you the details.
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EPISODE 506
Broadcast Date:
June 16, 20259 minutes
Podcasts Jun 16, 2025Root Causes 506: Recap of CABF Face-to-face #65
For the first time ever, Jason and I record an episode from the floor of the CA/Browser Forum face-to-face meeting. We recap the themes of this meeting, and Jason gives his first impressions of a CABF Face-to-face.
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EPISODE 505
Broadcast Date:
June 13, 202510 minutes
Podcasts Jun 13, 2025Root Causes 505: Trust Now, Forge Later
In this episode we explain the potential for future quantum computers to break files signed today with RSA or ECC, called "Trust now, forge later."