Patent ID: 8724548
Filing Date: 2014-05-13
Classification: H04L,H04W

Abstract:
1. A method, comprising: detecting a rollover of a packet data sequence number in successive data packets of a transmission received by a receiving device; incrementing, in response to said rollover, a variable data portion of a deciphering key stored in a memory of said receiving device, wherein said deciphering key comprises said variable data portion and said packet data sequence number; transmitting a synchronization message from said receiving device to a source device; comparing said variable data portion of said deciphering key with a transmitter variable data portion of a transmitter deciphering key received from a transmitting device; and in response to said variable data portion being different from said transmitter variable data portion, determining an amount of re-processing to be performed to reset said variable data portion to said transmitter variable data portion; in response to said amount of re-processing not exceeding a predetermined amount, resetting said variable data portion to said transmitter variable data portion; and in response to said amount of re-processing exceeding the predetermined amount, releasing a connection between said receiving device and said transmitting device.