Conversation:

Notices

1. Joshua Judson Rosen (rozzin)'s status on Sunday, 02-Mar-2014 15:18:51 EST Joshua Judson Rosen
   The #problem w/ #checksum as #ID: users need basic understanding of the nature of a !crypto #hash. http://status.hackerposse.com/url/5412
   • kat (boneidol)'s status on Sunday, 02-Mar-2014 16:04:07 EST kat

     Remote profile options...

     • Joshua Judson Rosen
     if you truncate the checksum collisions will happen sooner.
     Joshua Judson Rosen likes this.
   • Joshua Judson Rosen (rozzin)'s status on Sunday, 02-Mar-2014 16:40:39 EST Joshua Judson Rosen

     • kat
     For every person who understands all of the implications of abbreviating a !crypto #hash, I wouldn't be surprised if there are a million who can't imagine there's any problem.
   • Joshua Judson Rosen (rozzin)'s status on Sunday, 02-Mar-2014 16:47:52 EST Joshua Judson Rosen

     • kat
     #git practically advocates abbreviating SHA-1 !crypto hashes to 7 hexits; #redmine habitually abbreviates them to 8; somehow this never collides with the notion that "the unlikelihood of hash-collisions is astronomical because it's SHA-1".
   • kat (boneidol)'s status on Sunday, 02-Mar-2014 19:03:32 EST kat

     Remote profile options...

     • Joshua Judson Rosen
     so 8 hex digits is a 2^32 space, so 50% chance of collision is ~ 2^16, 1 in 65536 ?
   • Joshua Judson Rosen (rozzin)'s status on Sunday, 02-Mar-2014 19:15:42 EST Joshua Judson Rosen

     • kat
     @boneidol, something like that: https://en.wikipedia.org/wiki/Birthday_attack#Mathematics !crypto
   • Joshua Judson Rosen (rozzin)'s status on Sunday, 02-Mar-2014 19:18:04 EST Joshua Judson Rosen

     • kat
     @boneidol, it's nice to know I'm not the only person dumbfounded by the #doublethink.