System and method of lawful access to secure communications

摘要

Systems and methods for secure communications are provided. In some aspects, a method of signalling an interception time period is described. At least one keying information used by a key management service (KMS) to regenerate a key is stored. A start_interception message is signaled from an administration function (ADMF) to a call session control function (CSCF). A halt_message is signaled from the ADMF to the CSCF.

主权项

1. A method of signaling an interception time period, the method comprising:
storing at least one keying information used by a key management service (KMS) to regenerate a key; receiving, at a call session control function (CSCF), a start_interception message from an administration function (ADMF) in a network node over a X1_1 interface, wherein the start_interception message indicates a starting time for the interception time period of a lawful interception; decrypting intercepted packets using the key; and receiving, at the CSCF, a halt_message from the ADMF, wherein the halt_message indicates that the lawful interception is to be stopped.