I've uploaded a new #Perl Critic policy that checks code for naive random data generation from a hash over not-so-randonm sources like rand(), system time, pid such as

md5_hex( rand . time . $$ . ++$counter )

This anti-pattern is used in many places, and has been the reason for several CVEs.

https://metacpan.org/release/RRWO/Perl-Critic-Policy-Security-RandBytesFromHash-v0.1.0

#CPAN #security

As a scholarly aside, I am curious as to who first came up this anti-pattern.