Method for determining proximity of target node to source node

Method for determining proximity of target node to source node

  • CN 1,685,687 B
  • Filed: 09/22/2003
  • Issued: 10/30/2013
  • Est. Priority Date: 09/30/2002
  • Status: Active Grant
First Claim
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1. a definite destination node comprises for the method for the propinquity of source node:

  • After destination node and source node are verified the discriminating stage of Public key each other with corresponding digital certificate, prepare the first response at destination node immediately, wherein the first response comprises the random number of private key signature public-key encryption and that use destination node that uses source node, wherein after the discriminating stage, carry out immediately encryption and the signature of random number, so as this encryption with the signature response receive from source node the inquiry after can be used for immediately sending to source node from destination node;

    To inquire about from source node and send destination node to;

    After destination node receives this inquiry and before this inquiry of deciphering, send the first response to source node from destination node immediately;

    Receive the first response at source node;

    Process this inquiry at destination node, in order to generate accordingly the second response of the checking that helps destination node and the first response thereof;

    Send the second response to source node from destination node;

    Determine transmitting this inquiry and receiving the measurement of the call duration time between the first response;

    WithAccording to the measurement of call duration time, determine the propinquity of destination node.

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