Pairing-free equality test over short ciphertexts. (June 2017)

• Record Type: Journal Article
• Authors: Zhu, Huijun; Wang, Licheng; Ahmad, Haseeb; Niu, Xinxin
• Is Part Of: International journal of distributed sensor networks. Volume 13:Number 6(2017)
• Publication Date: 2017-06
• Subjects: Public key encryption with equality test -- cloud storage -- flexible authorization; Sensor networks -- Periodicals; Intelligent agents (Computer software) -- Periodicals; Multisensor data fusion -- Periodicals; 681.2
• DOI: 10.1177/1550147717715605
• Languages: English
• ISSNs: 1550-1329

Abstract

The concept of public key encryption with equality test was introduced at CT-RSA 2010. It has been used in many fields, especially in cloud storage. However, the previous schemes do not provide an effective authorization mechanism. To fill this gap, Ma et al. presented a public key encryption with equality test supporting flexible authorization based on the bilinear pairings. Recently, Lin et al. presented a pairing-free scheme that employs quadratic curve to perform the equality tests, which can achieve a trade-off between computational cost and storage space. In this article, we show that the equality test can be better performed by using a straight line, rather than a quadratic curve. Moreover, we simplify the encryption algorithm, as well as reduce the ciphertext storage space.