Secure Computing consisted of several merged units, one of the oldest being Enigma Logic, Inc., which was started around 1982. Bob Bosen, the founder, claims to have created the first security token to provide challenge-response authentication. Bosen published a computer game for the TRS-80 home computer in 1979, called "80 Space Raiders", that used a simple challenge response mechanism for copy protection. People who used the mechanism encouraged him to repackage it for remote authentication. Bosen started Enigma Logic to do so, and filed for patents in 1982–83; a patent was issued in the United Kingdom in 1986. Ultimately, the "challenge" portion of the challenge response was eliminated to produce a one-time password token similar to the SecurID product. Enigma Logic merged with Secure Computing Corporation in 1996.