Method and apparatus to facilitate transmission of an encrypted rolling code

A method to facilitate transmitting a remote control message comprising:

• accessing a fixed message having a first part and a second part;
• accessing an encrypted rolling code having at least a third part, a fourth part, a fifth part, and a sixth part;
• accessing a plurality of differing data bit order patterns;
• accessing a plurality of differing data inversion patterns;
• based at least on the first part of the encrypted rolling code, selecting first patterns from the following:
• the plurality of differing data bit order patterns and the plurality of differing data inversion patterns;
• based at least on the second part of the encrypted rolling code, selecting second patterns from the following;
• the plurality of differing data bit order patterns and the plurality of differing data inversion patterns;
• and
• transmitting:
• the first part of the fixed message and the fifth part of the encrypted rolling code using the selected first patterns as transmission characteristics;
• and
• the second part of the fixed message and the sixth part of the encrypted rolling code using the selected second patterns as transmission characteristics.

An apparatus comprising:

• a first memory having a fixed value stored therein;
• a second memory having an encrypted rolling code stored therein;
• a first lookup table that correlates a first plurality of different encrypted rolling code values with corresponding differing data bit order patterns from a plurality of differing data bit order patterns;
• a second lookup table that correlates a second plurality of different encrypted rolling code values with corresponding differing data inversion patterns from a plurality of differing data inversion patterns;
• a processor that is operably coupled to the first memory, the second memory, the first lookup table, and the second lookup table, the processor being configured and arranged to use a predetermined portion of the encrypted rolling code to select patterns from the following:
• the plurality of differing data bit order patterns and the plurality of differing data inversion patterns;
• and
• a transmitter operably coupled to the first memory, the second memory, and to the processor, the transmitter being configured and arranged to transmit the fixed value and at least a part of the encrypted rolling code using the selected patterns as transmission characteristics.

A method for use with a receiver that is configured and arranged to compatibly receive and process an encrypted rolling code transmitted from a remote device, wherein:

• the encrypted rolling code comprises a part that was transmitted using selected patterns of transmission characteristics, the selected patterns of transmission characteristics beings selected based at least in part on a rolling code, wherein a first one of the selected patterns comprises a selected one of a plurality of differing data bit order patterns, and wherein a second one of the selected patterns comprises a selected one of a plurality of differing data inversion patterns;
• the method comprising:
• generating a message that will be compatibly received and processed by the receiver as the transmitted encrypted rolling code;
• and
• transmitting the message to the receiver.