Patent ID: 7116786
Filing Date: 2006-10-03
Classification: H04K

Abstract:
1. A method for interception in a secure communication system, the method comprising the steps of: providing, by a network a first key to a first user; providing by a network a second key to a second user, thereby establishing communication between the first user and the second user; transmitting encrypted data from the first user to the second user; storing, by the secure communication system, the first key, the second key and an initial condition of a PN code in a decrypt function; storing, by the secure communication system, the encrypted data produced subsequent to the establishment of the communication between the first user and the second user; receiving, by the secure communication system an intercept activation request for the first user subsequent to the establishment of communication between the first user and the second user; receiving, by the decrypt function the encrypted data since establishment of communication between the first user and the second user; receiving, by the decrypt function, a data volume of the encrypted data which has occurred since establishment of communication between the first user and the second user and prior to the intercept request; and decrypting the encrypted data to plain text data by the decrypt function using the first and second keys, the initial condition of the PN code and the data volume, wherein the data volume is used to synchronize the network with a pseudo random number generator.