Google has taken a strong position supporting Merkle Tree Certificates (MTC) as the PQC-enabled future for SSL / TLS.

Tim Callan


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 by Tim Callan
In this webinar, we break down the architecture of a modern Private PKI, how to bridge the gap between your existing legacy Microsoft infrastructure and the emerging requirements of modern security standards.
Root Causes 604: Accelerated Timeline for Quantum Computers Breaking ECC in Crypto and Blockchain
A new paper from Google Quantum AI and others documents a new technique for breaking ECC, particularly the curve protecting crypto currencies, smart contracts, and blockchain. This accelerates post quantum cryptography (PQC) timelines.
Root Causes 603: Cryptographically Relevant Quantum Computing (CRQC) with Only 10,000 Qubits
New research suggests that a cryptographically relevant quantum computer is achievable with only 10,000 qubits. This was an important contributor to Google moving its PQC target to 2029.
Google has announced that it is moving its target for full PQC support to 2029. This is a strong statement from one of the most knowledgeable PQC technology companies that the existing 2030 target is too late.
Legacy PKI implementations hold back technical progress and create security risk. We discuss reasons why, consequences, and what to do about it.
In our previous episode we defined cryptography as the new geopolitics. We follow up to explain how all cryptographic decisions reflect social, political, and legal viewpoints of the cryptography's designers.
In the last decade or so, nations around the world have become keenly determined to use cryptography for their own legal, economic, and military advantage. We explore this concept.
A recent CISA report declares that the nation's OT infrastructure is incapable of keeping up with the crypto agility and certificate management needs that modern security demands. We examine this finding.