To Hybrid or Not to Hybrid… (R22b)
Numerous certificate mechanisms have been proposed for transitioning to post-quantum cryptography, many involving hybrid cryptography. For existing systems, moving from traditional algorithms to post-quantum algorithms often requires a transition period where multiple algorithms are used simultaneously or in hybrid combinations. This is necessary to address interoperability, backward compatibility, security, testing, and policy requirements. This talk examines the post-quantum transition by approaching the problem in reverse—starting with specific use cases, defining their transition requirements, and identifying mechanisms to facilitate the transition. The goal is to simplify the process and ease the path toward post-quantum cryptography.