A Speech Homomorphic Encryption Scheme with Less Data Expansion in Cloud Computing

Shi, Canghong1; Wang, Hongxia2; Hu, Yi3; Qian, Qing1; Zhao, Hong4

2019-05-31

10.3837/tiis.2019.05.020

KSII Transactions on Internet and Information Systems   影响因子和分区

1976-7277

Speech homomorphic encryption has become one of the key components in secure speech storing in the public cloud computing. The major problem of speech homomorphic encryption is the huge data expansion of speech cipher-text. To address the issue, this paper presents a speech homomorphic encryption scheme with less data expansion, which is a probabilistic statistics and addition homomorphic cryptosystem. In the proposed scheme, the original digital speech with some random numbers selected is firstly grouped to form a series of speech matrix. Then, a proposed matrix encryption method is employed to encrypt that speech matrix. After that, mutual information in sample speech cipher-texts is reduced to limit the data expansion. Performance analysis and experimental results show that the proposed scheme is addition homomorphic, and it not only resists statistical analysis attacks but also eliminates some signal characteristics of original speech. In addition, comparing with Paillier homomorphic cryptosystem, the proposed scheme has less data expansion and lower computational complexity. Furthermore, the time consumption of the proposed scheme is almost the same on the smartphone and the PC. Thus, the proposed scheme is extremely suitable for secure speech storing in public cloud computing.

Homomorphic encryption digital speech signal secure speech storing less data expansion cloud computing

SCI ; EI

英语

其他

National Natural Science Foundation of China (NSFC)[U1536110] ; National Natural Science Foundation of China (NSFC)[61402219]

Computer Science ; Telecommunications

Computer Science, Information Systems ; Telecommunications

WOS:000469945500020

KSII-KOR SOC INTERNET INFORMATION

20192807171729

Cloud computing ; Matrix algebra ; Speech ; Speech communication

Digital Computers and Systems:722.4 ; Speech:751.5 ; Algebra:921.1

Web of Science

1.Southwest Jiaotong Univ, Sch Informat Sci & Technol, Chengdu 610031, Sichuan, Peoples R China
2.Sichuan Univ, Coll Cybersecur, Chengdu 610041, Sichuan, Peoples R China
3.Northern Kentucky Univ, Comp Sci Dept, Highland Hts, KY 41099 USA
4.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518000, Peoples R China

Shi, Canghong,Wang, Hongxia,Hu, Yi,et al. A Speech Homomorphic Encryption Scheme with Less Data Expansion in Cloud Computing[J]. KSII Transactions on Internet and Information Systems,2019,13(5):2588-2609.

Shi, Canghong,Wang, Hongxia,Hu, Yi,Qian, Qing,&Zhao, Hong.(2019).A Speech Homomorphic Encryption Scheme with Less Data Expansion in Cloud Computing.KSII Transactions on Internet and Information Systems,13(5),2588-2609.

Shi, Canghong,et al."A Speech Homomorphic Encryption Scheme with Less Data Expansion in Cloud Computing".KSII Transactions on Internet and Information Systems 13.5(2019):2588-2609.