WebOct 12, 2024 · Bit commitment using pseudo-randomness (extended abstract) Conference Paper. Jul 1989; Moni Naor; We show how a pseudo-random generator can provide a bit commitment protocol. We also analyze the ... In 1991 Moni Naor showed how to create a bit-commitment scheme from a cryptographically secure pseudorandom number generator. The construction is as follows. If G is pseudo-random generator such that G takes n bits to 3n bits, then if Alice wants to commit to a bit b: Bob selects a random 3n-bit … See more A commitment scheme is a cryptographic primitive that allows one to commit to a chosen value (or chosen statement) while keeping it hidden to others, with the ability to reveal the committed value later. Commitment … See more Formal definitions of commitment schemes vary strongly in notation and in flavour. The first such flavour is whether the commitment scheme provides perfect or computational … See more Some commitment schemes permit a proof to be given of only a portion of the committed value. In these schemes, the secret value $${\displaystyle X}$$ is a vector of many … See more Physical unclonable functions (PUFs) rely on the use of a physical key with internal randomness, which is hard to clone or to emulate. Electronic, optical and other types of PUFs have … See more Coin flipping Suppose Alice and Bob want to resolve some dispute via coin flipping. If they are physically in the same place, a typical procedure might be: 1. Alice "calls" the coin flip 2. Bob flips the coin See more A commitment scheme can either be perfectly binding (it is impossible for Alice to alter her commitment after she has made it, even if she has unbounded computational … See more It is an interesting question in quantum cryptography if unconditionally secure bit commitment protocols exist on the quantum level, that is, protocols which are (at least … See more

Bit - Weizmann

WebNov 11, 2024 · where xᵢ · λᵢ is a bit string, result of the concatenation between the bit string xᵢ and the single bit λᵢ. The H function generates a one bit longer sequence from the initial seed. By calling the H function l(k) times and taking just the last bit from each iteration, we have generated a sequence of l(k) bits. Obviously this function is G.. We are now able to … WebNov 1, 2004 · We show that if the adversary is constrained by an (α, β) assumption then there exist four-round almost concurrent zero-knowledge interactive proofs and perfect concurrent zero-knowledge arguments for every language in NP. c++ string get char at index

Solved Bit Commitment: Using Pseudo-Random-Sequence

WebNov 2, 1994 · LMR. M. Luby, S. Micali, and C. Rackoff, "How to Simultaneously Exchange Secret Bit by Flipping a Symmetrically-Biased Coin," Proc. of FOCS'83, pp.23-30 (1983) Nao. M.Naor, "Bit Commitment Using Pseudo- Randomness," in Advances in Cryptology Crypto '89, proceedings, Lecture Notes in Computer Science 435, Springer-Verlag, … Webpseudo-random generator, a bit t commitmen proto col can b e constructed. This is er eak w condition, since ao Y ao] [Y has wn sho that pseudo-random generators can b e … WebA zap is a 2‐round, public coin witness‐indistinguishable protocol in which the first round, consisting of a message from the verifier to the prover, can be fixed “once and for all” and applied to any instance. We present a zap for every language in NP, based on the existence of noninteractive zero‐knowledge proofs in the shared random string model. The zap is … c++ string getchar