Ciphertext poly attribute base encryption method having efficient attribute revocation capability
A technology of attribute-based encryption and ciphertext strategy, which is applied in the field of information security and can solve the problems of not meeting actual needs, tediousness, low revocation efficiency, etc.
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[0073] Such as figure 1 and figure 2 As shown, the specific process of this embodiment is as follows:
[0074] Step 1. System establishment
[0075] The attribute authority AA randomly selects a set of parameters α and β from the public key function database, including two multiplicative cyclic groups G and G whose order is a prime number p T , the generator g of the group G and the bilinear pairing map e: G×G→G T . Among them, the generator g is:
[0076] g=4825753236114302700181009551893401628723199415732972015970622054593498921292879986485027569312907193857799469116963683969768920235934912260481192099662160,4048850100117591308690978073403290894218008271572038432682891321098549039994467134474260108405016782650931484816763740889273827461896634534759269691983847,0
[0077] According to the selected parameters α and β, AA generates the system public parameters PK and the master private key MK, and makes the system public parameters PK public and keeps the master private k...
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