Adaptively secure ciphertext-policy attribute-based encryption with dynamic policy updating
نویسندگان
چکیده
منابع مشابه
Chosen Ciphertext Secure Ciphertext-Policy Attribute-Based Encryption with Constant Ciphertext Length and Threshold Policy
A ciphertext-policy attribute-based encryption scheme allows that an encrypter assigns a decryption policy to ciphertexts. Any user will be able to decrypt if and only if a set of attributes (his private key) satisfy the assigned decryption policy. In this paper we first propose a new chosen ciphertext secure ciphertext-policy attribute-based encryption scheme with constant-size ciphertext and ...
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Ciphertext-policy attribute-based encryption (CP-ABE) is regarded as a promising cryptographic tool for encrypted access control in public cloud storage systems. However, a problem for CP-ABE schemes is that there is no way to change access policy on ciphertext once it is generated. This shortcoming makes us cannot conveniently use CP-ABE as traditional 1-to-1 public key encryption when the acc...
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In a ciphertext-policy attribute-based encryption (CP-ABE) scheme, the data is encrypted under an access policy defined by a user who encrypts the data and a user secret key is associated with a set of attributes which identify the user. A user can decrypt the ciphertext if and only if his attributes satisfy the access policy. In CP-ABE, since the user enforces the access policy at the encrypti...
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A Ciphertext-Policy Attribute-Based Proxy Re-Encryption (CP-ABPRE) employs the PRE technology in the attribute-based encryption cryptographic setting, in which the proxy is allowed to convert an encryption under an access policy to another encryption under a new access policy. CP-ABPRE is applicable to many real world applications, such as network data sharing. The existing CP-ABPRE systems, ho...
متن کاملCiphertext Policy Attribute based Encryption with anonymous access policy
In Ciphertext Policy Attribute based Encryption scheme, the encryptor can fix the policy, who can decrypt the encrypted message. The policy can be formed with the help of attributes. In CP-ABE, access policy is sent along with the ciphertext. We propose a method in which the access policy need not be sent along with the ciphertext, by which we are able to preserve the privacy of the encryptor. ...
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ژورنال
عنوان ژورنال: Science China Information Sciences
سال: 2016
ISSN: 1674-733X,1869-1919
DOI: 10.1007/s11432-015-5428-1