[zbuf]

These keys have always seemed remarkably short.

Roughly how many CPU-hours does it take to find a collision?

[garaetjjte]

"It takes 4 seconds to generate a colliding 32bit key id on a GPU"

source: https://evil32.com/

[meta_AU]

I'm using ABCDABCD, and from memory it took a couple of hours. The hardest part was picking a 'vanity' short id that wasn't already taken.