[$] HTTPS certificates in the age of quantum computing

There has been ongoing discussion in theInternet Engineering Task Force (IETF)about how to protect internet traffic against future quantum computers. So far,that work has focused on key exchange as the most urgent problem; now,a new IETF working group is looking at adopting post-quantum cryptographyfor authentication and certificate transparency as well. The main challenge todoing so is the increased size ofcertificates - around 40 times larger. The techniques that the working group is investigatingto reduce that overhead could have efficiency benefits for traditionalcertificates as well.