Method and apparatus for acquiring SIP signaling decryption parameters

Disclosed in the embodiment of the present invention is a method for acquiring session initiation protocol (SIP) signaling decryption parameters and the method comprises the following steps: the authentication information of the Gm interface and the authentication information of the Cx interface are acquired; a security association (SA) decryption table is created according to the acquired authentication information of the Cx interface and authentication information of the Gm interface, wherein the SA decryption table comprises SIP signaling decryption parameters. A device for acquiring SIP signaling decryption parameters is also disclosed in the embodiments of the present invention.