method and apparatus for secure group messaging

method and apparatus for secure group messaging

  • CN 103,765,810 B
  • Filed: 07/13/2012
  • Issued: 03/13/2018
  • Est. Priority Date: 07/15/2011
  • Status: Active Grant
First Claim
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1. it is a kind of be used for protect in a communications system with Peer from the first computing device be delivered to the second computing device toThe method of few message, this method comprise the following steps:

  • At first computing device, establish and as reciprocity end authenticator run the 3rd computing device between based on markThe certification key exchange session of knowledge, the certification key exchange session based on mark have recognizing based on mark associated with itDemonstrate,prove session key;

    At first computing device, the random key point of second computing device is obtained from the 3rd computing deviceAmount, wherein before the random key component of second computing device is sent into first computing device, by described theThree computing devices use the authen session key based on mark to carry out the random key component of second computing deviceEncryption;

    At first computing device, peer message transmission is calculated using the random key component of second computing deviceKey;

    Via the 4th computing device run as Messaging server, by least one message from first computing deviceSecond computing device is sent to, wherein transmitting key at least one message using the peer message before transmittingIt is encrypted;

    AndAt first computing device, calculated with the 3rd computing device or as the 5th of Key Management server operationDevice calculates and stored together at least one random key component, wherein the random key component of first computing device is by instituteThe acquisition of the second computing device is stated, and it is identical with the peer message transmission key that first computing device is calculated to be used to calculatingPeer message transmit key,Wherein described first computing device is calculated and stored more together with the 3rd computing device or the 5th computing deviceIndividual random key component, wherein each random key component and given period phase in the multiple random key componentIt is corresponding.

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