منابع مشابه
Efficient Lattice (H)IBE in the Standard Model
We construct an efficient identity based encryption system based on the standard learning with errors (LWE) problem. Our security proof holds in the standard model. The key step in the construction is a family of lattices for which there are two distinct trapdoors for finding short vectors. One trapdoor enables the real system to generate short vectors in all lattices in the family. The other t...
متن کاملBuilding Efficient PKE and IBE from Distributed Passwords
Distributed-password public-key cryptography (DPwPKC) allows the members of a group of people, each one holding a small secret password only, to help a leader to perform the private operation, associated to a public-key cryptosystem. Abdalla et al. recently defined this tool [1], with a practical construction. Unfortunately, the latter applied to the ElGamal decryption only, and relied on the D...
متن کاملFully-Secure Lattice-Based IBE as Compact as PKE
We construct an identity-based encryption (IBE) scheme from the standard Learning with Errors (LWE) assumption, which both has a compact public-key (with size similar to known lattice-based PKE schemes) and also achieves adaptive security in the standard model. This improves over previous IBE schemes from lattices, which either have a public key that grows at least linearly with the length of t...
متن کاملAn Efficient Lattice-Based Secret Sharing Construction
This paper presents a new construction of a lattice-based verifiable secret sharing scheme. Our proposal is based on lattices and the usage of linear hash functions to enable each participant to verify its received secret share. The security of this scheme relies on the hardness of some well known approximation problems in lattices such as n-approximate SVP. Different to protocols proposed by P...
متن کاملAn Efficient Identity-based Signcryption from Lattice
Signcryption is a cryptographic primitive that can provide valid solution for authentication and confidentiality. In this paper, an efficient identity-based signcryption scheme from lattice was proposed. Our scheme based on Macciancio and Piekert’s trapdoor generation method and delegate algorithm for lattice. Our main idea is that establish the identity-based system master key via trapdoor gen...
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ژورنال
عنوان ژورنال: ITM Web of Conferences
سال: 2016
ISSN: 2271-2097
DOI: 10.1051/itmconf/20160701014