created: 20230711110503152
creator: Octt
modified: 20231220005057044
modifier: Octt
tags: 
title: Hashing

<<^wikipediaframe "Hash function">>

<<^wikipediaframe MD5>>

* [[Generate md5 checksum for all files in a directory|https://askubuntu.com/questions/318530/generate-md5-checksum-for-all-files-in-a-directory]] --- `find -type f -exec md5sum "{}" + > checklist.chk`

MD5 nowadays is known much vulnerable to collisions:

* [[Are there two data blocks causing and MD5 collision?|https://crypto.stackexchange.com/questions/1434/are-there-two-known-strings-which-have-the-same-md5-hash-value]]
** [[MD5 Collision Demo|https://www.mscs.dal.ca/~selinger/md5collision/]]
** [[Create your own MD5 collisions|https://natmchugh.blogspot.com/2015/02/create-your-own-md5-collisions.html]]