Not 57+, but how about 21? I just stumbled upon an article that states: "There are rumors that government agencies have the capability to recover data that has been overwritten as many as 21 times."
This is a SANS GSEC article originally published on 7/21/2001, and updated on 6/12/2006, titled "Secure File Deletion: Fact of Fiction?" by John R. Mallery, and lives at: http://www.sans.org/reading_room/whitepapers/incident/631.php?portal=662 2a0e4fbbfba19f870ef0961b096be Michael
