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In predicate encryption for a function ff, an authority can create ciphertexts and secret keys which are associated with `attributes'. A user with decryption key KyKy corresponding to attribute yy can...
We consider the problem of garbling arithmetic circuits and present a garbling scheme for inner-product predicates over exponentially large fields. Our construction stems from a generic transformation...
Inner product functional encryption (IPFE), introduced by Abdalla et al. (PKC2015), is a kind of functional encryption supporting only inner product functionality. All previous IPFE schemes are bounde...
The existence of secure indistinguishability obfuscators (iO) has far-reaching implications, significantly expanding the scope of problems amenable to cryptographic study. All known approaches to cons...
In this paper, we initiate the study of \emph{garbled protocols} --- a generalization of Yao's garbled circuits construction to distributed protocols. More specifically, in a garbled protocol construc...
Recent works (Lin, EUROCRYPT'16, ePrint'16; Lin and Vaikunthanathan, FOCS'16; Ananth and Sahai, EUROCRYPT'17) establish a tight connection between constructions of indistinguishability obfuscation fro...
In this paper, we present new adaptively secure identity-based encryption (IBE) schemes. One of the distinguishing property of the schemes is that it achieves shorter public parameters than previous s...
Functional encryption is a new paradigm of public-key encryption that allows a user to compute f(x) on encrypted data CT(x) with a private key SKf to finely control the revealed information. Multi-inp...
We propose the first Key-policy Attribute-based Encryption (KP-ABE) scheme for (monotone) Boolean circuits based on bilinear maps. The construction is based on secret sharing and just one bilinear m...
Bilinear maps are popular cryptographic primitives which have been commonly used in various modern cryptographic protocols. However, the cost of computation for bilinear maps is expensive because of t...
Signcryption is a cryptographic primitive that fulfills both the functions of digital signature and public key encryption simultaneously, at a cost significantly lower than that required by the trad...
The success of electronic authentication systems, be it e- ID card systems or Internet authentication systems such as CardSpace, highly depends on the provided level of user-privacy. Thereby, an imp...
Forward-secure signatures are used to defeat signature forgeries in cases of key exposure. In this model, the signature key evolves with time and it is computationally infeasible for an adversary to...
We propose a new computational complexity assumption from bilinear map, based on which we construct Verifier-Local Revocation group signatures with shorter lengths than previous ones.

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