System and method of lawful access to secure communications
AssigneesBlackBerry Limited, Certicom Corp.
InventorsMatthew John Campagnan, Gregory Marc Zaverucha, Michael Eoin Buckley
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to systems and methods for secure communications. In some aspects, a method of signalling an interception time period is described. At least one keying information used by a KMF to regenerate a key is stored. A start_interception message is signaled from an ADMF to a CSCF. A halt_message is signaled from the ADMF to the CSCF.
Claims17
A call session control function (CSCF), comprising:
- a memory;
- and
- at least one hardware processor communicatively coupled with the memory and configured to:
- receive 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 an interception time period of a lawful interception;
- in response to receiving the start_interception message, initiate a request to a key management service (KMS) to regenerate a key based on stored keying information, wherein the regenerated key is used to decrypt one or more intercepted packets during the interception time period;
- and
- receive a halt_message from the ADMF, wherein the halt_message indicates that the lawful interception is to be stopped.
A non-transitory computer-readable medium containing instructions which, when executed, cause a computing device to perform operations comprising:
- 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 an interception time period of a lawful interception,
- in response to receiving the start_interception message, initiating a request to a key management service (KMS) to regenerate a key based on stored keying information, wherein the regenerated key is used to decrypt one or more intercepted packets during the interception time period;
- and
- receiving, at the CSCF, a halt_message from the ADMF, wherein the halt_message indicates that the lawful interception is to be stopped.
A method, comprising:
- 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 an interception time period of a lawful interception;
- in response to receiving the start_interception message, initiating a request to a key management service (KMS) to regenerate a key based on stored keying information;
- decrypting the one or more intercepted packets during the interception time period using the regenerated 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.
Dependencies are inferred from the claim text.