Abstract
In order to solve the problem of short message sharing in multi-user environment, we improve the existing CP-ABE encryption scheme, and propose a high efficient encryption scheme for short message protection. To improve the decryption efficiency, we reduce the number of bilinear operations to a fixed range in the decryption operation. And we use the security model which resists in distinguish ability chosen plaintext attacks in the CP-ABE encryption scheme to carry out a safety proof. Several experiments show that the encryption scheme performs with high efficiency and remains sufficient security.
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