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Articles by Antonio Faonio
Lookup Arguments: Improvements, Extensions and Applications to Zero-Knowledge Decision Trees
Paper 2023/1518 , Protocol Labs , EURECOM , IMDEA Software , Delft University of Technology , University of Tartu Lookup arguments allow to prove that the elements of a committed vector come from a (bigger) committed table. They enable novel approaches to reduce the prover complexity of general-purpose zkSNARKs, implementing “non-arithmetic operations” such as range checks, XOR and AND more efficiently.
From Polynomial IOP and Commitments to Non-malleable zkSNARKs
Paper 2023/569 From Polynomial IOP and Commitments to Non-malleable zkSNARKs , EURECOM , IMDEA Software , University of Edinburgh , EURECOM , Nethermind We study sufficient conditions for compiling simulation-extractable zkSNARKs from information-theoretic interactive oracle proofs (IOP) using a simulation-extractable commit-and-prove system for its oracles.
Almost Tightly-Secure Re-Randomizable and Replayable CCA-secure Public Key Encryption
Paper 2023/152 Almost Tightly-Secure Re-Randomizable and Replayable CCA-secure Public Key Encryption , EURECOM , ETH Zurich , EURECOM Abstract Re-randomizable Replayable CCA-secure public key encryption (Rand-RCCA PKE) schemes guarantee security against chosen-ciphertext attacks while ensuring the useful property of re-randomizable ciphertexts.
Auditable Asymmetric Password Authenticated Public Key Establishment
Paper 2020/060 Auditable Asymmetric Password Authenticated Public Key Establishment , EURECOM Abstract Non-repudiation of messages generated by users is a desirable feature in a number of applications ranging from online banking to IoT scenarios. However, it requires certified public keys and usually results in poor usability as a user must carry around his certificate (e.g., in a smart-card) or must install it in all of his devices.
Short Non-Malleable Codes from Related-Key Secure Block Ciphers, Revisited
Paper 2022/1100 Short Non-Malleable Codes from Related-Key Secure Block Ciphers, Revisited , Sapienza University of Rome , EURECOM , Carnegie Mellon University , Sapienza University of Rome Abstract We construct non-malleable codes in the split-state model with codeword length $m + 3\lambda$ or $m+5\lambda$, where $m$ is the message size and $\lambda$ is the security parameter, depending on how conservative one is.
Mix-Nets from Re-Randomizable and Replayable CCA-secure Public-Key Encryption
Paper 2022/856 Mix-Nets from Re-Randomizable and Replayable CCA-secure Public-Key Encryption , EURECOM , EURECOM Abstract Mix-nets are protocols that allow a set of senders to send messages anonymously. Faonio et al. (ASIACRYPT’19) showed how to instantiate mix-net protocols based on Public-Verifiable Re-randomizable Replayable CCA-secure (Rand-RCCA) PKE schemes.
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