Publication Type

Journal Article

Version

publishedVersion

Publication Date

10-2020

Abstract

Hierarchical identity-based signature (HIBS) plays a core role in a large community as it significantly reduces the workload of the root private key generator. To make HIBS still available and secure in post-quantum era, constructing lattice-based schemes is a promising option. In this paper, we present an efficient HIBS scheme in polynomial rings. Although there are many lattice-based signatures proposed in recent years, to the best of our knowledge, our HIBS scheme is the first ring-based construction. In the center of our construction are two new algorithms to extend lattice trapdoors to higher dimensions, which are non-trivial and of independent interest. With these techniques, the security of the new scheme can be proved, assuming the hardness of the Ring-SIS problem. Since operations in the ring setting are much faster than those over integers and the new construction is the first ring-base HIBS scheme, our scheme is more efficient and practical in terms of computation and storage cost when comparing to the previous constructions.

Keywords

HIBS, Lattice, Ring-SIS, Post-Quantum

Discipline

Information Security

Research Areas

Information Systems and Management

Publication

Computer Journal

Volume

63

Issue

10

First Page

1490

Last Page

1499

ISSN

0010-4620

Identifier

10.1093/comjnl/bxaa033

Publisher

Oxford University Press (OUP): Policy B - Oxford Open Option B

Additional URL

http://doi.org/10.1093/comjnl/bxaa033

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