Patent ID: 9350721
Filing Date: 2016-05-24
CPC Classification: G06F,H04L,H04W

Claim Text:
1. An air interface security method, comprising in a transmission protocol process the steps of: 1) a proximity coupling device transmitting a security parameter request message to a proximity card; 2) the proximity card feeding back security parameters to the proximity coupling device after receiving the security parameter request message; and 3) the proximity coupling device and the proximity card setting up a secure link between them according to the security parameters: wherein the step 1) further comprises: the proximity coupling device transmitting a Request for Answer To Select, RATS, including the security parameter request message to the proximity card to initiate security parameter negotiation with the proximity card; the step 2) further comprises: the proximity card returning an Answer To Select, ATS, to the proximity coupling device after receiving an RATS of the proximity coupling device, wherein the ATS includes information on a support condition of the proximity card for an authentication mechanism and a cipher algorithm; the step 3) further comprises: after the proximity coupling device negotiates about the security parameters with the proximity card, both of them performing identity authentication in accordance with an authentication mechanism as a result of negotiation, and setting up the secure link between the proximity coupling device and the proximity card upon successful identity authentication.