Dates are inconsistent

Dates are inconsistent

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Possible spell-corrected query: bounded multi-hoc
2024/1023 (PDF) Last updated: 2024-06-25
Constant-Size Unbounded Multi-Hop Fully Homomorphic Proxy Re-Encryption from Lattices
Feixiang Zhao, Huaxiong Wang, Jian Weng
Public-key cryptography

Proxy re-encryption is a cryptosystem that achieves efficient encrypted data sharing by allowing a proxy to transform a ciphertext encrypted under one key into another ciphertext under a different key. Homomorphic proxy re-encryption (HPRE) extends this concept by integrating homomorphic encryption, allowing not only the sharing of encrypted data but also the homomorphic computations on such data. The existing HPRE schemes, however, are limited to a single or bounded number of hops of...

2024/895 (PDF) Last updated: 2024-06-05
Fully-Succinct Multi-Key Homomorphic Signatures from Standard Assumptions
Gaspard Anthoine, David Balbás, Dario Fiore
Foundations

Multi-Key Homomorphic Signatures (MKHS) allow one to evaluate a function on data signed by distinct users while producing a succinct and publicly-verifiable certificate of the correctness of the result. All the constructions of MKHS in the state of the art achieve a weak level of succinctness where signatures are succinct in the total number of inputs but grow linearly with the number of users involved in the computation. The only exception is a SNARK-based construction which relies on a...

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