| Autor: |
Klamti Jean Belo, Hasan Mohammed Anwarul |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Journal of Mathematical Cryptology, Vol 18, Iss 1, Pp p. 152-82 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1862-2984 |
| DOI: |
10.1515/jmc-2023-0012 |
| Popis: |
A chameleon hash function is a type of hash function that involves a trapdoor to help find collisions, i.e., it allows the rewriting of a message without modifying the hash. For some applications, it is important to have the feature of revoking the rewriting privilege of the trapdoor holder. In this paper, using lattice-based hard problems that are considered quantum-safe, we first introduce a lattice-based chameleon hash with an ephemeral trapdoor (CHET)\left({\mathsf{CHET}}) and then a revocable attribute-based encryption (RABE{\mathsf{RABE}}) scheme that is adaptively indistinguishable. We also give security analyses of our schemes and compare our RABE{\mathsf{RABE}} scheme to two relevant schemes proposed recently. Furthermore, we combine our CHET{\mathsf{CHET}} and RABE{\mathsf{RABE}} to design a new revocable policy-based chameleon hash. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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