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 UpcomingThe use cases of private and public CAs
Join our webinar to explore public vs. private CAs, their use cases, key selection factors, and the risks of choosing the wrong one.
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REGISTER
A live webinar hosted by Sectigo.
60 minutes
Webinars Upcoming47-day revolution: What shorter certificate lifespans means for you
47-day certs are coming. Learn how to prepare in our webinar: discovery, automation, rollout, and crypto-agility.
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Sectigo at CA/Browser Forum Tokyo 2025: Key Takeaways
Blog Post from Sectigo
Blog Posts Apr 14, 2025Sectigo joined CA/B Forum Tokyo 2025 to shape digital trust. Highlights: 47-day certs, Open MPIC, and legal challenges in web security.
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47 day certificates are happening: what they mean for security
Blog Post from Sectigo
Blog Posts Apr 14, 202547-day certificate lifecycles are here—reshaping web security, pushing automation, and helping reduce cyber risks in a rapidly evolving digital world.
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EPISODE 486
Broadcast Date:
April 14, 202511 minutes
Podcasts Apr 14, 2025Root Causes 486: 47-day Maximum Term Ballot Passes CABF
Apple's ballot to step the maximum term for public SSL certificates down to 47 days has passed in the CA/Browser Forum.
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EPISODE 485
Broadcast Date:
April 12, 202520 minutes
Podcasts Apr 12, 2025Root Causes 485: What Is Open MPIC?
Guest Dmitry Sharkov joins us to describe Open MPIC, the open-source project to help public CAs support MPIC.
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EPISODE 484
Broadcast Date:
April 9, 202514 minutes
Podcasts Apr 09, 2025Root Causes 484: Multi Good Factor Authentication
We define multi good factor authentication, which is the idea that not all authentication factors are equal. We discuss the importance of considering authentication strength and the contextual nature of trust.
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EPISODE 483
Broadcast Date:
April 7, 202523 minutes
Podcasts Apr 07, 2025Root Causes 483: Introducing the PQC Sandbox
We are joined by repeat guest Bruno Coulliard of Crypto4A to introduce Sectigo's new post quantum cryptography (PQC) sandbox. The PQC sandbox allows you to get quantum resistant certificates in your hands to understand how they work with your systems.
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Subdomain hijacking: risks & prevention tips
Blog Post from Sectigo
Blog Posts Apr 02, 2025Attackers hijack abandoned subdomains to run phishing scams. Prevent this by auditing DNS records, removing outdated entries, and enforcing cloud security.