Indistinguishability Obfuscation from Functional Encryption
نویسندگان
چکیده
منابع مشابه
Indistinguishability Obfuscation from Compact Functional Encryption
The arrival of indistinguishability obfuscation (iO) has transformed the cryptographic landscape by enabling several security goals that were previously beyond our reach. Consequently, one of the pressing goals currently is to construct iO from well-studied standard cryptographic assumptions. In this work, we make progress in this direction by presenting a reduction from iO to a natural form of...
متن کاملIndistinguishability Obfuscation from Functional Encryption for Simple Functions
We show how to construct indistinguishability obfuscation (iO) for circuits from any non-compact functional encryption (FE) scheme with sub-exponential security against unbounded collusions. We accomplish this by giving a generic transformation from any such FE scheme into a compact FE scheme. By composing this with the transformation from sub-exponentially secure compact FE to iO (Ananth and J...
متن کاملPrivate Functional Encryption: Indistinguishability-Based Definitions and Constructions from Obfuscation
Private functional encryption guarantees that not only the information in ciphertexts is hidden but also the circuits in decryption tokens are protected. A notable use case of this notion is query privacy in searchable encryption. Prior privacy models in the literature were fine-tuned for specific functionalities (namely, identity-based encryption and inner-product encryption), did not model co...
متن کاملAchieving Compactness Generically: Indistinguishability Obfuscation from Non-Compact Functional Encryption
We show how to construct indistinguishability obfuscation (iO) for circuits from any noncompact functional encryption (FE) scheme with sub-exponential security against unbounded collusions. We accomplish this by giving a generic transformation from any such FE scheme into a compact FE scheme. By composing this with the transformation from sub-exponentially secure compact FE to iO (Ananth and Ja...
متن کاملIndistinguishability Obfuscation for All Circuits from Secret-Key Functional Encryption
We show that indistinguishability obfuscation (IO) for all circuits can be constructed solely from secret-key functional encryption (SKFE). In the construction, SKFE need to be able to issue a-priori unbounded number of functional keys, that is, collusion-resistant. Our strategy is to replace public-key functional encryption (PKFE) in the construction of IO proposed by Bitansky and Vaikuntanath...
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ژورنال
عنوان ژورنال: Journal of the ACM
سال: 2018
ISSN: 0004-5411,1557-735X
DOI: 10.1145/3234511