Web2016), and MuSig by Maxwell et al. (ePrint 2024). In this work, we point out serious security issues in all currently known two-round multi-signature schemes (without pairings). First, … Webtwo-round Schnorr-based multi-signatures, with a novel concurrent attack relying on the generalized birthday algorithm of Wagner [Wag02]. They accordingly proposed mBCJ …
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WebAbstract. We describe a new Schnorr-based multi-signature scheme (i.e., a protocol which allows a group of signers to produce a short, joint signature on a common message) called $$\mathsf {MuSig}$$, provably secure under the Discrete Logarithm assumption and in the plain public-key model (meaning that signers are only required to have a public key, but … Web2 de fev. de 2024 · Revisions A preliminary version of this paper, dated January 15, 2024, proposed a 2-round variant of \(\mathsf {MuSig}\), where the initial commitment round is omitted, claiming provable security under the One More Discrete Logarithm (OMDL) assumption [10, 11].However, Drijvers et al. [] have discovered a flaw in the security …
Web29 de nov. de 2024 · Abstract: Multi-signatures enable a group of signers to produce a single signature on a given message.Recently, Drijvers et al. (S&P’19) showed that all thus far proposed two-round multi-signature schemes in the DL setting (without pairings) are insecure under concurrent sessions, i.e., if a single signer participates in multiple signing … Web2 de mai. de 2024 · On the Security of Two-Round Multi-Signatures Manu Drijvers (DFINITY, ETH Zurich), Kasra Edalatnejad (EPFL), Bryan Ford (EPFL), Eike Kiltz (Ruhr-Universitä...
Web15 de set. de 2024 · When concurrent executions are allowed, our algorithm leads to practical attacks against unforgeability of blind signature schemes such as Schnorr and Okamoto–Schnorr blind signatures, threshold signatures such as GJKR and the original version of FROST, multisignatures such as CoSI and the two-round version of MuSig, … WebOur DL-based threshold signatures are the first two-round scheme with security proved based solely on the discrete logarithm assumption in the ROM. The most efficient protocol is FROST [KG20,BCK`22], which is slightly more efficient than our scheme since it generates plain Schnorr signatures; however, FROST relies on the stronger OMDL assumption.
WebInsecure Multi-signatures: Drijvers et al. [11] invalidated the security of some Schnorr-based two-round multi-signature schemes [3,18,19,26]byshowingan attack based on the k-sum problem [27]. The key observation that Drijvers et al. [11] made was that a multi-signature participant choosing her signature random-
WebInformation Security, pages 435464. Springer, 2024. [2] Manu Drijvers, Kasra Edalatnejad, Bryan Ford, Eike Kiltz, Julian Loss, Gregory Neven, and Igors Stepanovs. On the security of two-round multisignatures. In On the Security of Two-Round Multi-Signatures, page 0. IEEE, 2024. [3] Manu Drijvers, Sergey Gorbunov, Gregory Neven, and Hoeteck Wee. how many cheetah girls are thereWeb13 de abr. de 2024 · The approaches taken in our two-round protocols are highly inspired by \(\mathsf {mBCJ}\) discrete log-based multi-signature by Drijvers et al. In particular, we observe that it is crucial for two-round protocols to use message-dependent commitment keys (as in \(\mathsf {mBCJ}\)) instead of a single fixed key for all signing attempts (as in … high school for performing arts near meWeb11 de ago. de 2024 · In this paper, we propose a simple and lightweight two-round Schnorr-based multi-signature protocol that we call delinearized witness multi-signatures … high school for my addressWebThis work presents the first provably secure forward-secure multi-signature scheme by deriving a forwardsecure signature scheme from the hierarchical identity-based … high school for performing and visual artsWebWe prove the security of a variant of the two-round MuSig 2 scheme with proofs of possession and a three-round multisignature SimpleMuSig. We introduce a novel three … how many cheetah in indiaWebOn the Security of Two-Round Multi-Signatures Manu Drijvers∗†, Kasra Edalatnejad ‡, Bryan Ford , Eike Kiltz §, Julian Loss , Gregory Neven∗, Igors Stepanovs¶ ∗DFINITY, high school for mentally illWebManu Drijvers, Kasra Edalatnejad, Bryan Ford, Eike Kiltz, Julian Loss, Gregory Neven, and Igors Stepanovs. 2024. On the security of two-round multi-signatures. In On the Security of Two-Round Multi-Signatures. IEEE, 0. Google Scholar; Lisa Eckey, Sebastian Faust, Kristina Hostáková, and Stefanie Roos. 2024. how many cheetahs are alive