Re-Encryption Scheme of Secure Data Sharing for Dynamic Groups in the Cloud
نویسندگان
چکیده
منابع مشابه
Time-based proxy re-encryption scheme for secure data sharing in a cloud environment
A fundamental approach for secure data sharing in a cloud environment is to let the data owner encrypt data before outsouring. To simultaneously achieve fine-grained access control on encrypted data and scalable user revocation, existing work combines attribute-based encryption (ABE) and proxy re-encryption (PRE) to delegate the cloud service provider (CSP) to execute re-encryption. However, th...
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We remark that the scheme [IEEE TPDS, 27(1), 2016, 40-50] is flawed because the group manager cannot complete his computational task in the registration phase. Actually, they have misunderstood the concept of public key which is usually associated with an asymmetric encryption algorithm. Besides, the mechanism that the group manager has to re-encrypt all data stored in the cloud after a member ...
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Proxy re-encryption (PRE) enables a semi-trusted proxy to delegate the decryption right by re-encrypting the ciphertext under the delegator’s public key to an encryption under the public key of delegatee. Fueled by the translation ability, PRE is regarded as a promising candidate to secure data sharing in a cloud environment. However, the security of the PRE will be totally destroyed in case th...
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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...
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ژورنال
عنوان ژورنال: International Journal of Computer Applications
سال: 2017
ISSN: 0975-8887
DOI: 10.5120/ijca2017914913