https://openwall.info/wiki/ 2026-04-18T19:32:04+02:00 https://openwall.info/wiki/ https://openwall.info/wiki/lib/tpl/local/images/favicon.ico text/html 2011-02-21T04:51:17+02:00 https://openwall.info/wiki/passwdqc/policy?rev=1298260277&do=diff Many system administrators are tempted to relax passwdqc's default policy settings in order to make it easier for the users to choose and remember passwords that would pass the policy. Unfortunately, this very likely results in unacceptably weak passwords being allowed. The following (revised) excerpt from an e-mail exchange between a user of passwdqc (a system administrator) and Solar Designer (the original author and a maintainer of passwdqc) explains some of these issues. text/html 2026-03-06T09:50:44+02:00 https://openwall.info/wiki/passwdqc/rockyou?rev=1772787044&do=diff Input data There are a total of 32,603,387 plaintext passwords on the RockYou list, including duplicates. There are 14,344,391 unique passwords. Raw results passwdqc 2.1.0 with default policy permits the following numbers of passwords from RockYou “top N” lists (most common N unique passwords): text/html 2010-06-23T01:18:46+02:00 https://openwall.info/wiki/passwdqc/solaris?rev=1277248726&do=diff Ensure the system is prepared Since passwdqc is distributed in source code form, you will need to have a C compiler installed - either gcc or Sun Studio cc. You may download gcc from Sunfreeware. The C compiler invocation command must be in your search PATH - that is, when you type gcc or cc (as appropriate), you should receive output like gcc: no input files or usage: cc [ options] files. Use 'cc -flags' for details rather than a “command not found” message. You also need to have the /usr/…