Distributed verifiable random number generation method based on CP-ABE
A CP-ABE and random number technology, applied in the field of cryptography, can solve the problems of consuming large resources, not being widely recognized, and difficult to resist rights and interests smashing attacks, and achieve the effect of improving fault tolerance and anti-cheating
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[0017] The distributed verifiable random number generation method based on the multi-attribute authorization center CP-ABE proposed by the present invention assumes that there are n=3 nodes A, B, and C in the system, and the threshold ratio t / n is 1 / 2, that is, if there are If there are more than or equal to 2 nodes, the random number of the present invention will definitely be generated, and it is unpredictable, unbiased, and publicly verifiable. The specific steps are:
[0018] (1) The first node to join the system calls the global setting function provided by the system to get the global parameter GP, and announces it; each node calls the private setting function. Take node B as an example, input the global parameter GP, and get its own public key SK 2 and private key PK 2 , the private key is private, the public key is broadcast, and finally each node gets the list of public keys (PK 1 、PK 2 、PK 3 );
[0019] (2) Each user calls the encryption function to encrypt the...
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