Philippe Camacho

dblp:13/1643 · DBLP profile ↗
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7ranked-venue papers
4as first author
2since 2021 · last 2023
0000-0001-6026-9069ORCID · corroborated

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Security and privacy · 6 · 4 first-author · 2 since 2021Artificial intelligence and machine learning · 1
YearPublicationVenuePosition
2023 Threshold Signatures from Inner Product Argument: Succinct, Weighted, and Multi-threshold
abstract
Threshold signatures protect the signing key by sharing it among a group of signers so that an adversary must corrupt a threshold number of signers to be able to forge signatures. Existing threshold signatures with succinct signatures and constant verification times do not work if signers have different weights. Such weighted settings are seeing increasing importance in decentralized systems, especially in the Proof-of-Stake blockchains. This paper presents a new paradigm for threshold signatures for pairing and discrete logarithm-based cryptosystems. Our scheme has a compact verification key consisting of only 7 group elements, and a signature consisting of 8 group elements. Verifying the signature requires 8 exponentiations and 8 bilinear pairings. Our scheme supports arbitrary weight distributions among signers and arbitrary thresholds. It requires non-interactive preprocessing after a universal powers-of-tau setup. We prove the security of our scheme in the Algebraic Group Model and implement it using Golang. Our evaluation shows that our scheme achieves a comparable signature size and verification time to a standard (unweighted) threshold signature. Compared to existing multisignature schemes, our scheme has a much smaller public verification key.
Sourav Das 0001, Philippe Camacho, Zhuolun Xiang, Javier Nieto, Benedikt Bünz, Ling Ren 0001
CCS2
2023 VeriZexe: Decentralized Private Computation with Universal Setup
Alex Luoyuan Xiong, Binyi Chen, Zhenfei Zhang, Benedikt Bünz, Ben Fisch, Fernando Krell, Philippe Camacho
USENIX Security Symposium7
2018 Asynchronous Provably-Secure Hidden Services
Philippe Camacho, Fernando Krell
CT-RSA1
2013 Fair Exchange of Short Signatures without Trusted Third Party
Philippe Camacho
CT-RSA1
2012 Short Transitive Signatures for Directed Trees
Philippe Camacho, Alejandro Hevia
CT-RSA1
2008 Strong Accumulators from Collision-Resistant Hashing
Philippe Camacho, Alejandro Hevia, Marcos A. Kiwi, Roberto Opazo
ISC1
2004 Evaluation of Chess Position by Modular Neural Network Generated by Genetic Algorithm
Mathieu Autonès, Ariel Beck, Philippe Camacho, Nicolas Lassabe, Hervé Luga, François Scharffe
EuroGP3