Privacy preserving revocable predicate encryption revisited
نویسندگان
چکیده
منابع مشابه
Privacy preserving revocable predicate encryption revisited
Predicate encryption (PE) that provides both the access control of ciphertexts and the privacy of ciphertexts is a new paradigm of public-key encryption. An important application of PE is a searchable encryption system in cloud storage, where it enables a client to securely outsource the search of a keyword on encrypted data without revealing the keyword to the cloud server. One practical issue...
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We introduce the concept of Revocable Predicate Encryption (RPE), which extends the previous PE setting with revocation support: private keys can be used to decrypt an RPE ciphertext only if they match the decryption policy (defined via attributes encoded into the ciphertext and predicates associated with private keys) and were not revoked by the time the ciphertext was created. The first chall...
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Predicate encryption, formalized by Katz, Sahai, and Waters (EUROCRYPT 2008), is an attractive branch of public-key encryption, which provides fine-grained and role-based access to encrypted data. As for many multi-user cryptosystems, an efficient revocation mechanism is necessary and imperative in the context of predicate encryption, in order to address scenarios when users misbehave or their ...
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Predicate encryption is a new encryption paradigm which gives a master secret key owner fine-grained control over access to encrypted data. The master secret key owner can generate secret key tokens corresponding to predicates. An encryption of data x can be evaluated using a secret token corresponding to a predicate f ; the user learns whether the data satisfies the predicate, i.e., whether f(...
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Efficient user revocation is a necessary but challenging problem in many multi-user cryptosystems. Among known approaches, serveraided revocation yields a promising solution, because it allows to outsource the major workloads of system users to a computationally powerful third party, called the server, whose only requirement is to carry out the computations correctly. Such a revocation mechanis...
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ژورنال
عنوان ژورنال: Security and Communication Networks
سال: 2014
ISSN: 1939-0114
DOI: 10.1002/sec.994