I am reading http://www.jya.com/sig-attack.htm --- Then, in late 1942, the Royal Navy switched codes to the one-time pad system. The Nazi tap was lost forever because the pad system is unbreakable in both theory as well as practice. U-boats could no longer ambush helpless ships like wolves on sheep. Convoy after convoy arrived safe and intact, protected in the armor of an unbreakable code system. The U-boats had to change tactics. http://www.us.net/softwar/ Germany used the enigma algorithm and machine. Japan used the purple algorithm. And look what happened to them. About crypto algorithms. "Those who cannot remember the past are doomed to repeat it." -- George Santyana, 1905 Title: Black and White Test of Cryptographic Algorithms Jump to Forum Click Image to Jump to Next Article Go to Text Only Print Version Black and White Test of Cryptographic Algorithms by William H. Payne This article requires special formatting. Please Click Here to Read Send This Article to a Friend: Your Name: Email Address of your Friend: Your Email address: Back to Home Page Quick Menu Visit the Button Shop Interactive Forum Black and White Test of Cryptographic Algorithms E-mail the Editor