DEVICES, METHODS, APPARATUS AND COMPUTER READABLE MEDIUM FOR COMMUNICATIONS

Abstract

Embodiments of the present disclosure relate to method, device and computer readable media for communications. A first device generates an integrity protection key and a cipher key based on a paging key and Non-Access Stratum (NAS) algorithm information. The first device receives, from a second device, a message comprising voice fallback information. The voice fallback information is integrity protected by the integrity protection key and encrypted by the cipher key. The first device decrypts the voice fallback information with the cipher key. In response to a failure of verifying integrity of the voice fallback information with the integrity protection key, the first device discards the message.

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