Re:Show HN: 5+ Billion Passwords in Order of Most Popular
by bradleyjg on Monday June 12, 2017 @11:15AM
(#14537944)
It looks like they gzip the file over the wire and then work with it uncompressed. That's probably a reasonable choice given they use only 30,000 passwords.
There should be libraries in any language used to develop systems which validate user-entered passwords.