US Patent 7840712 Hybrid internet protocol encryptor/decryptor bypass device

A system (706, 714) is provided for a network signaling bypass around a cryptographic device (1008, 1108). The system is comprised of an interface (1002, 1102) configured to receive a plurality of packets and communicate the packets that are of a non-GIST type to a non-GIST bypass circuit (1004-1, 1004-2) and the packets that are of a GIST type to a GIST bypass circuit (1006-1, 1006-2). The non-GIST bypass circuit is configured to selectively bypass a first packet around the cryptographic device to an output device (1010, 1110, 1012, 1112) if the first packet comprises signaling protocol data for a network (710) over which the first packet is communicated. The GIST bypass circuit is configured to selectively bypass a second packet around the cryptographic device to the output device if the second packet comprises GIST signaling transport protocol data for the network over which the second packet is communicated.