| 摘要 |
A secure learning system for use in the remote control of security devices. A microchip encoder (10) transmits a signal which controls key generation information derived from a seed, a serial number and the operation of an algorithm and a key on an input value. A microchip decoder (12) receives the signal and extracts the key generation information which is then used as a second key, or to generate a second key, optionally with the use of a manufacturer's key which, itself, may be modified. The second key is used for decoding signals in normal operation of the system. By storing a number of parameter sets at the encoder and at the decoder, the encoder can function as any one of a number of different virtual encoders, and the decoder can respond thereto. <IMAGE> |
