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- W2001030614 abstract "We propose attribute-based encryption schemes where encryptor-specified policies (called ciphertext policies) are hidden. By using our schemes, an encryptor can encrypt data with a hidden access control policy. A decryptor obtains her secret key associated with her attributes from a trusted authority in advance and if the attributes associated with the decryptor's secret key do not satisfy the access control policy associated with the encrypted data, the decryptor cannot decrypt the data or guess even what access control policy was specified by the encryptor. We prove security of our construction based on the Decisional Bilinear Diffie-Hellman assumption and the Decision Linear assumption. In our security notion, even the legitimate decryptor cannot obtain the information about the access control policy associated with the encrypted data more than the fact that she can decrypt the data." @default.
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- W2001030614 date "2009-01-01" @default.
- W2001030614 modified "2023-10-16" @default.
- W2001030614 title "Attribute-Based Encryption with Partially Hidden Ciphertext Policies" @default.
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- W2001030614 doi "https://doi.org/10.1587/transfun.e92.a.22" @default.
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