System and method of lawful access to secure communications
First Claim
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1. 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.
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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.
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Citations
17 Claims
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1. A call session control function (CSCF), comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer-readable medium containing instructions which, when executed, cause a computing device to perform operations comprising:
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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. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method, comprising:
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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. - View Dependent Claims (14, 15, 16, 17)
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Specification