Quite some time ago now (!), I wrote ‘In the New Year, I’ll post more information about the new project and, in particular, progress with integrating Yubikey use into Cosign.’
Practical work on this project stalled since I wrote that sentence – in part, owing to the lack of a ‘real’ test case which we could use for serious testing. However we’ve now restarted the effort, and I’ll document the successful integration into Cosign of Yubikey two-factor authentication in some forthcoming posts.