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Efficient identity-based fully homomorphic encryption over NTRU

Authors :
Ran DUAN
Chun-xiang GU
Yue-fei ZHU
Yong-hui ZHENG
Li CHEN
Source :
Tongxin xuebao, Vol 38, Pp 66-75 (2017)
Publication Year :
2017
Publisher :
Editorial Department of Journal on Communications, 2017.

Abstract

Fully homomorphic encryption is the best solution for solving privacy concerns for data over cloud so far,while large public key size is a general shortcoming for existing schemes.First,by introducing the concept of Kullback-Leibler divergence,an identity-based public key scheme over NTRU lattice with modified ciphertext form was proposed.Analysis on parameter setting showed its small key size and ciphertext size,and experiments revealed its high computational efficiency.Second,with the idea of approximate eigenvector,an improved method to convert the scheme into an identity-based fully homomorphic encryption one was put forward to further reduce ciphertext size.Compared with existing schemes,the converted scheme not only abandons evaluation keys to make it fully identity-based,but also has smaller keys and ciphertext,which results in higher computational and transmission efficiency.

Details

Language :
Chinese
ISSN :
1000436X
Volume :
38
Database :
Directory of Open Access Journals
Journal :
Tongxin xuebao
Publication Type :
Academic Journal
Accession number :
edsdoj.26af679a2511464dbc695c71fa55b58c
Document Type :
article
Full Text :
https://doi.org/10.11959/j.issn.1000-436x.2017008