Post Syndicated from Bruce Schneier original https://www.schneier.com/blog/archives/2024/09/yubikey-side-channel-attack.html

There is a side-channel attack against YubiKey access tokens that allows someone to clone a device. It’s a complicated attack, requiring the victim’s username and password, and physical access to their YubiKey—as well as some technical expertise and equipment.

Still, nice piece of security analysis.