Mobile communication method, apparatus, and device

  • US 10,944,786 B2
  • Filed: 08/27/2019
  • Issued: 03/09/2021
  • Est. Priority Date: 01/05/2016
  • Status: Active Grant
First Claim
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1. A mobile communication method, comprising:

  • sending, by a user equipment (UE), and attach request message to a mobility management entity, wherein the attach request message includes a first UE security capability of the UE;

    receiving, by the UE, a non-access stratum (NAS) security mode command message from the mobility management entity, wherein the NAS security mode command message comprises a first hash value, an integrity algorithm, a key identifier, a first NAS message authentication code (NAS-MAC) of the NAS security mode command message, and a second UE security capability;

    calculating, by the UE, a second NAS-MAC of the NAS security mode command message;

    determining, by the UE, whether the second NAS-MAC is consistent with the first NAS-MAC and the first UE security capability is consistent with the second UE security capability;

    in response to determining that the second NAS-MAC is consistent with the first NAS-MAC and the first UE security capability is consistent with the second UE security capability, determining, by the UE, whether a second hash value is consistent with the first hash value, wherein the second hash value is a hash value of the attach request message; and

    sending, by the UE, the first NAS security mode complete message to the mobility management entity in response to determining that the second hash value is inconsistent with the first hash value, wherein the first NAS security mode complete message having integrity protection comprises the attach request message.

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