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1. (WO2013117243) LAWFUL INTERCEPTION OF ENCRYPTED COMMUNICATIONS

Pub. No.:    WO/2013/117243    International Application No.:    PCT/EP2012/057788
Publication Date: Fri Aug 16 01:59:59 CEST 2013 International Filing Date: Sat Apr 28 01:59:59 CEST 2012
IPC: H04L 29/06
Applicants: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
NÄSLUND, Mats
IOVIENO, Maurizio
NORRMAN, Karl
Inventors: NÄSLUND, Mats
IOVIENO, Maurizio
NORRMAN, Karl
Title: LAWFUL INTERCEPTION OF ENCRYPTED COMMUNICATIONS
Abstract:
A method and apparatus for providing access to an encrypted communication between a sending node and a receiving node to a Law Enforcement Agency (LEA). A Key Management Server (KMS) function stores cryptographic information used to encrypt the communication at a database. The cryptographic information is associated with an identifier used to identify the encrypted communication between the sending node and the receiving node. The KMS receives a request for Lawful Interception, the request including an identity of a Lawful Interception target. The KMS uses the target identity to determine the identifier, and retrieves the cryptographic information associated with the identifier from the database. The cryptographic information can be used to decrypt the encrypted communication. The KMS then sends either information derived from the cryptographic information or a decrypted communication towards the LEA. This allows the LEA to obtain a decrypted version of the communication.