Introduction to GPU Password Cracking: Owning the…

This TrustedSec blog post walks through their methodology for cracking the 2012 LinkedIn SHA1 password dump (~117M unique hashes) using cudaHashcat/hashcat: splitting large files, brute‑force and mask attacks, dictionary and rule‑based attacks, hybrid and combinator methods, mask optimization from statsgen/maskgen, and expanding cracked passwords — reporting substantial recovery (roughly ~50% initially and up to ~85% with later techniques).