bobda - this really is not a TECH worthy question - you should know better - it belongs below the line.
You probably heard wrong. Random generation is something a computer excells at.
The release of "Pretty Good Privacy" aka PGP launched a criminal investigation by the US government into its young creator....(facinating history of the still young public internet...and a connection to Garrison Keller)
To reach a random "seed" as noted above - phone books have been a source of random numbers...i.e. last five digits of every 50th number beginning on a page opened by chance, before "published random tables" and before computer generators. Phone books also may provide a common source for two unknown parties to share a common key.
The modern desk top computer provides a statistical processor that thirty-five years ago cost hunderds of dollars for a few minutes use and required several pounds of "punch cards" not to mention hours of tabulation.
(BTW - Hasbro dropped their lawsuit regarding one version of the on-line game)
Sincerely,
Gargoyle