London ? A rebuilt World War II code-cracking computer developed to intercept Nazi messages lost to a desktop computer Friday in a contest to decipher an encrypted radio message.

The challenge marked the first time the Colossus machine had been used since former Prime Minister Winston Churchill ordered models of the top secret computer destroyed, according to Britain’s National Museum of Computing, which organized the contest.

Churchill had feared Britain’s national security would be threatened if the state of the art computer’s technical details ever leaked out.