[Resource Topic] 2013/746: Asymptotically Efficient Lattice-Based Digital Signatures

Welcome to the resource topic for 2013/746

Title:
Asymptotically Efficient Lattice-Based Digital Signatures

Authors: Vadim Lyubashevsky, Daniele Micciancio

Abstract:

We present a general framework that converts certain types of linear collision-resistant hash functions into one-time signatures. Our generic construction can be instantiated based on both general and ideal (e.g. cyclic) lattices, and the resulting signature schemes are provably secure based on the worst-case hardness of approximating the shortest vector (and other standard lattice problems) in the corresponding class of lattices to within a polynomial factor. When instantiated with ideal lattices, the time complexity of the signing and verification algorithms, as well as key and signature size is almost linear (up to poly-logarithmic factors) in the dimension n of the underlying lattice. Since no sub-exponential (in n) time algorithm is known to solve lattice problems in the worst case, even when restricted to ideal lattices, our construction gives a digital signature scheme with an essentially optimal performance/security trade-off.

ePrint: https://eprint.iacr.org/2013/746

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