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 UpcomingQ4 2024 Pulse Webinar
Join us for our quarterly Sectigo Pulse webinar, where we cover the latest product and compliance news and how these events might impact your business.
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EPISODE 432
Broadcast Date:
October 14, 202426 minutes
Podcasts Oct 14, 2024Root Causes 432: Apple Floats New Short-lived Certificate Proposal
Apple recently floated a draft CABF ballot for commentary that steps down maximum term for SSL certificates to 45 days by 2027.
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EPISODE 431
Broadcast Date:
October 11, 202428 minutes
Podcasts Oct 11, 2024Root Causes 431: New Mozilla Proposal to Combat Delayed Revocation
Deliberate delay of mandatory revocations has plagued the WebPKI in 2024. A new proposed policy from Mozilla stands to eliminate most of this behavior.
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EPISODE 429
Broadcast Date:
October 8, 20247 minutes
Podcasts Oct 08, 2024Root Causes 429: ServiceNow Outage Due to Expired Root Certificate
A ServiceNow private CA root expired, creating outages across hundreds of enterprises. We explain what appears to have gone on.
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EPISODE 428
Broadcast Date:
October 4, 202417 minutes
Podcasts Oct 04, 2024Root Causes 428: .MOBI Attack Puts WHOIS-based DCV into Question
White hat researchers managed to take over WHOIS for the .mobi TLD, foretelling the death of WHOIS as an email source for Domain Control Validation (DCV).
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EPISODE 427
Broadcast Date:
October 2, 202416 minutes
Podcasts Oct 02, 2024Root Causes 427: Mapping CLM to NIST CSF 2.0
In this episode we map the contributions of Certificate Lifecycle Management into the new NIST Cybersecurity Framework 2.0.
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60 minutes
Webinars Oct 01, 2024How mature is your Certificate Lifecycle Management?
The surge in certificate usage has reached unprecedented levels, with industry standards for certificate lifespans progressively shrinking.
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EPISODE 426
Broadcast Date:
September 30, 20248 minutes
Podcasts Sep 30, 2024Root Causes 426: Expired Certificate Takes Down Bank of England
A certificate expiration is now known to have created July's outage of Bank of England. Join us as we shake our heads in amazement yet again.
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EPISODE 425
Broadcast Date:
September 27, 202411 minutes
Podcasts Sep 27, 2024Root Causes 425: PQC Requirements for Voting Systems
In honor of the upcoming US elections, we describe the six main requirements for a post-quantum voting system.