Webinars

Digital certificates underpin trust on the internet, enabling authentication, encryption, and secure communications through Public Key Infrastructure (PKI). The transition to post-quantum cryptography introduces significant changes to how certificates are issued, validated, and managed. PQC algorithms require new signature schemes, larger key sizes, and updates to certificate formats, certificate authorities (CAs), and validation processes. Hybrid certificates—combining classical and quantum-resistant signatures—are emerging as a transitional approach.

This session examines how PQC impacts digital certificates, including changes to X.509 standards, certificate lifecycles, revocation models, and enterprise PKI systems. It also explores challenges such as compatibility across browsers and devices, performance considerations, and operational scalability.

Sean Turner is a recognized Internet security expert, long-time contributor to the Internet Engineering Task Force (IETF), and Chair of the IETF Transport Layer Security (TLS) Working Group, where he helps guide the evolution of the Internet’s most widely deployed security protocol. An active participant in the IETF since IETF 34, he has authored or co-authored more than 50 RFCs spanning Transport Layer Security (TLS), Public Key Infrastructure (PKI), S/MIME, BGP security, QUIC, and post-quantum cryptography. He previously served as the IETF Security Area Director on the Internet Engineering Steering Group (IESG) from 2007 to 2014 and has chaired numerous IETF working groups, including TLS, Messaging Layer Security (MLS), WebRTC Ingest Signaling over HTTPS (WISH), RTCWEB, SMIME, and XMPP.

In addition to his standards leadership, Sean is the founder of sn3rd llc, where he advises organizations on the design, implementation, and deployment of secure communications technologies. He has served in several key governance roles within the Internet community, including the Internet Society Board of Trustees, Treasurer of the IETF Administration LLC, and, most recently, Treasurer of the IETF Trust and Intellectual Property Management Corporation (IPMC). He is also the author of *Implementing Email and Security Tokens: Current Standards, Tools, and Practices* (John Wiley & Sons). Through his technical leadership and consensus-building across industry, academia, and government, Sean has played a significant role in advancing the security and interoperability of Internet protocols worldwide.