MOBILE COMMUNICATION METHOD, APPARATUS, AND DEVICE

  • US 20190387404A1
  • Filed: 08/27/2019
  • Published: 12/19/2019
  • Est. Priority Date: 01/05/2016
  • Status: Active Grant
First Claim
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1. A mobile communication method, comprising:

  • receiving, by a user equipment (UE), a non-access stratum (NAS) security mode command message from a mobility management entity, wherein the NAS security mode command message comprises a first hash value of an attach request message that is received by the mobility management entity, an integrity algorithm used by the mobility management entity, a key identifier, a first NAS message authentication code (NAS-MAC) of the NAS security mode command message, and a verification matching information, and wherein the verification matching information comprises a UE security capability sent back by the mobility management entity or a hash value of the UE security capability sent back by the mobility management entity;

    calculating, by the UE, a second NAS-MAC of the NAS security mode command message received from the mobility management entity;

    determining, by the UE, whether the second NAS-MAC is consistent with the first NAS-MAC and the UE security capability sent back by the mobility management entity is consistent with a UE security capability sent by the UE to the mobility management entity; and

    in response to determining that the second NAS-MAC is consistent with the first NAS-MAC and the UE security capability sent back by the mobility management entity is consistent with the UE security capability sent by the UE to the mobility management entity, 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 an attach request message sent by the UE to the mobility management entity;

    sending, by the UE, a 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 sent by the UE to the mobility management entity.

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