Cryptanalysis of a Fuzzy Identity Based Encryption Scheme in the Standard Model
نویسندگان
چکیده
منابع مشابه
Cryptanalysis of a Fuzzy Identity Based Encryption Scheme in the Standard Model
Fuzzy identity based encryption (FIBE), proposed by Sahai and Waters, is a new kind of identity based encryption. It allows users with identity w can decrypt ciphertext for w′ if and only if w is close enough to w′. Recently, Ren et al. proposed a new FIBE scheme and claimed it is fully CCA2 secure in the standard model with a tight reduction. However, in this paper we will show that their sche...
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Constructing identity based schemes is one of the hot topics of current cryptography. Hierarchical identity based cryptography is a generalization of identity based encryption that mirrors an organizational hierarchy. It allows a root public key generator to distribute the workload by delegating public key generation and identity authentication to lower-level public key generators. Currently, t...
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In a fuzzy identity-based encryption (IBE) scheme, a user with the secret key for an identity ID is able to decrypt a ciphertext encrypted with another identity ID′ if and only if ID and ID′ are within a certain distance of each other as judged by some metric. Fuzzy IBE also allows to encrypt a document to all users that have a certain set of attributes. In 2005, Sahai and Waters first proposed...
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Identity based signcryption (IBSC) is a novel cryptographic primitive that simultaneously provides the authentication and encryption in a single logic step. The IBSC has been shown to be useful in many applications, such as electronic commerce, mobile communications and smart cards. Recently, Li et al. (2013) [16] proposed a new identity based signcryption scheme and claimed that their scheme w...
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Sahai and Waters introduced a fuzzy id-based encryption (FIBE) scheme in which an identity was viewed as a set of descriptive attributes, and any user with a private key for an identity ID was allowed to decrypt a ciphertext encrypted with an identity ID′ , if and only if the identity ID and ID′were close to each other as measured by the “set overlap” distance metric. After that, Shweta Agrawal...
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ژورنال
عنوان ژورنال: Informatica
سال: 2012
ISSN: 0868-4952,1822-8844
DOI: 10.15388/informatica.2012.361