[PDF] Top 20 On Obfuscation with Random Oracles

... assisted” obfuscation, where some part of the computation is modeled as a black-box representing impenetrable secure hardware [GIS + 10, BCG + ...of obfuscation for all circuits of Garg ...full-fledged ... See full document

... require random oracles [8] and involve many rounds of interac- tion in the signing phase (some relying on interactive divertible proofs of knowledge [10]) and hence requiring that the signing authority ... See full document

... require random oracles. Since the random oracle is an assumption that cannot be realized securely in practice [17], many protocol de- signers strive for constructions in the standard ... See full document

... Regularity and Hash Function Balance. Bellare and Kohno [3] introduced a measure of the “amount of regularity” of a hash function (both keyless and dedicated-keyed ones) called “balance”. They showed how the success ... See full document

... One problem with the above (informal) definition of broadcast encryption is the implicit requirement that, whenever the digital content is encrypted and sent in broadcast, information about the set of authorized ... See full document

... the random oracle model. However, when random oracles are instantiated with concrete hash functions, those IBS schemes could be ...without random oracles which is computationally ... See full document

... without random oracles, and among the various types of nominative signature, one-move is the most efficient ...without random oracles even that the existing ones in the literature may not ... See full document

... the random oracle model is quite controversial, an important open problem after the construction of the Boneh-Franklin scheme was to develop an identity based encryption scheme which is provably secure in the ... See full document

... Our proof strategy requires several heavyweight tools. In particular, we assume multilin- ear maps (however in a way that is compatible with the recent candidates [24, 17]), indistin- guishability obfuscation, and ... See full document

... a random strings (rather than from encryption of random ...indistinguishability obfuscation for Turing machines and circuits ...indistinguishability obfuscation for Turing machines M ... See full document

... a random hash value (to be precise, in case of one-way permutations; but for treatment in this paper we will work with this definition even for one-way functions), as opposed to in the latter where an adversary ... See full document

... In this paper, we focus on the key-insulation paradigm in the identity-based setting. Identity-based encryption (IBE) has been widely studied thus far, and therefore we believe that the identity-based key- insulated ... See full document

... In this paper, a provable secure SDVS scheme based on bilinear pairings without random oracles is proposed. This scheme is based on Water’s scheme proposed in [26]. The security of the proposal, i.e. ... See full document

... In this paper, we stress that, due to the low efficiency of the existing iO candidates, our focus is mainly on the existence of a constant signature-size ARS scheme (secure without random oracles) based on ... See full document

... In this paper, a novel strong designated verifier scheme without random oracles is proposed. We use the paradigm which is slightly analogous to the Bellare and Goldwasser’s paradigm [1]; this paradigm ... See full document

... the random oracle such that it knows the secret key corresponding to pk, and simply decrypt the commitment to find the ...the random oracle as a public key, which is difficult for constructions based on ... See full document

... In terms of efficiency, our construction is quite efficient: it involves only two group exponentiation (Canetti’s construction requires a single exponentiation), does not rely on any setup assumptions, and does not rely ... See full document

... as a random execution of e π does (actually, the above facts hold for any reasonable definition of Finder 4 and for any function family). The interesting part is arguing that the joint output of the no-oracle ... See full document

... From a high-level point of view, our main result shows that in the 2-BRO model cryptographic hardness can be bootstrapped, even with access to both backdoor oracles and even when arbitrary backdoor capabilities ... See full document

... All the schemes mentioned so far are secure under some non-standard and parametrised assumptions. The first BE scheme secure proved secure under static assumptions was proposed by Waters [Wat09] using the dual system ... See full document