Key negotiation method and apparatus according to SM2 key exchange protocol
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United States of America Patent
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Apr 12, 2016
Grant Date -
May 7, 2015
app pub date -
Nov 26, 2012
filing date -
Nov 30, 2011
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Abstract
The invention relates to the technical field of information, and disclosed in the present invention are a key negotiation method and apparatus according to the SM2 key exchange protocol. The method is implemented as follows: two negotiation parties both calculate a parameter W according to the minimum positive integer value in the permissible values of X which enable an inequality n≦2X to hold, and perform key negotiation with the opposite negotiation party according to the parameter W. Compared with a method for calculating the parameter W through calculating log 2 (n) logarithmic value firstly and then rounding up the logarithmic value, the method disclosed by the invention has the advantages that the calculated amount is effectively reduced, and the implementation complexity of an algorithm is reduced, thereby greatly improving the implementation efficiency of the key negotiation process based on the SM2 key exchange protocol, and then optimizing the engineering implementation of the SM2 key exchange protocol.
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