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Network authentication method, method for client to request authentication, client, and device

  • US 8,800,001 B2
  • Filed: 04/03/2013
  • Issued: 08/05/2014
  • Est. Priority Date: 10/27/2008
  • Status: Active Grant
First Claim
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1. A network authentication method, comprising:

  • receiving synchronize (SYN) data sent by a client, wherein the SYN data comprises a sequence number SEQ1 and a network parameter, and the network parameter comprises an Identification (ID) in the header of the SYN data;

    sending synchronize acknowledge (SYN_ACK) data to the client in response to the SYN data, wherein the SYN_ACK data comprises an acknowledgment number ACK2, a value of ACK2 is the value obtained by carrying out a function transformation according to the network parameter of the SYN data, and the network parameter used in the function transformation comprises the ID in the header of the SYN data;

    receiving RESET (RST) data sent by the client in response to the SYN_ACK data, wherein the RST data comprises a sequence number SEQ3 or an acknowledgment number ACK3, a value of SEQ3 or ACK3 is the same as that of ACK2, and the RST data further comprises a network parameter the same as that of the SYN data;

    carrying out the function transformation according to the network parameter of the RST data to obtain a check value CHK; and

    passing the authentication of the client if CHK matches the value of SEQ3 or ACK3.

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