The Long Key ID Collider

1 · Christopher Wellons · July 22, 2019, 10:17 p.m.
Over the last couple weeks I’ve spent a lot more time working with OpenPGP keys. It’s a consequence of polishing my passphrase-derived PGP key generator. I’ve tightened up the internals, and it’s enabled me to explore the corners of the format, try interesting things, and observe how various OpenPGP implementations respond to weird inputs. For one particularly cool trick, take a look at these two (private) keys I generated yesterday. No, these were not derived from a passphrase. Here’s the first...