Keyword or multi-keyword based searchable encryption method and system
An encryption method and keyword technology, applied in the field of information security, can solve problems such as difficult implementation, slow encryption and decryption speed, and complex algorithms
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[0070] This embodiment discloses a keyword searchable encryption method, the steps are as follows:
[0071] S1. System initialization, generating system disclosure coefficients under input-based security parameters. The details are as follows: the system publicity coefficient is generated under the input-based security parameter k, where the system publicity coefficient includes the multiplicative group G, the multiplicative group generator g and the bilinear map e:G×G→G T .
[0072] S2. Generate the user's public key and private key according to the first parameter randomly selected by the user and the system disclosure coefficient. The specific process is as follows:
[0073] First calculate X and Y according to the first parameters x and y randomly selected by the user, where x, y ∈ Z p ,Z p is a prime number order group, calculated to get X=g x , Y=e(g,g) y ; Then generate the user's public key PK = (X, Y), private key sk = (x, y).
[0074] S3. Encrypt the keywords ...
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