Patent ID: 8618907

Claim:
A method for use in relation to a security system, the method comprising: receiving one or more items of information that individually identify things or users associated with the security system; forming a fixed portion of a security code using the one or more items of information, wherein the security code is configured to effect access to a secured area; storing the fixed portion of the security code in an apparatus that is configured to transmit the security code; forming a varying portion of the security code in response to an assertion of a user interface of the apparatus; and transmitting the varying portion and the fixed portion of the security code to a receiving apparatus, wherein the varying portion of the security code is configured to be used by the receiving apparatus to determine whether to effect operation of the receiving apparatus, and further wherein at least a portion of the fixed portion of the security code is configured to effect at least two different replacement decisions at the receiving apparatus based on a form of the at least a portion of the fixed portion of the security code, wherein a first form of the at least a portion of the fixed portion of the security code is configured to effect the receiving apparatus to add the fixed portion to a learned list of fixed portions corresponding to authorized transmitters, and wherein a second form of the at least a portion of the fixed portion of the security code is configured to effect the receiving apparatus to add the fixed portion to the learned list of fixed portions corresponding to authorized transmitters while erasing a corresponding previously learned fixed portion.