SYSTEM, DEVICE AND KEY GENERATION METHOD Russian patent published in 2022 - IPC H04W12/04 H04W36/14 

FIELD: information technologies.

SUBSTANCE: invention relates to key generation means. Using mobility management entity (hereinafter – MME), a message of a redirection request is received from a node of an access and mobility management function (AMF), while the message of the redirection request contains information related to a key, while the message of the redirection request is used for a service transmission request of a voice service from a package switching (PS) area to a channel switching (CS) area. Using MME, a decryption key and an integrity protection key are generated for the protection of a voice service based on information related to the key.

EFFECT: providing information security for a voice service.

30 cl, 14 dwg