DECODING A VCR CONTROLLER CODE
Ken W. Shirriff, Curt Welch, Andrew Kinsman · Cryptologia · 1992
The VCR Plus+ is a remote control for programming video cassette recorders. It uses an encrypted 1 to 8 digit number that encodes the channel, start time, length, and day of the month of the television show to be recorded. This paper describes a procedure for decoding the 1 to 6 digit codes.