Some Remarks on Cocks＇Identity-Based Encryption Scheme

作     者：ZHAO Xiaopeng 赵晓鹏

作者机构：School of Computer Science and TechnologyDonghua UniversityShanghai 201620China 

基　　金：Rising-Star Program of Shanghai 2023 Science and Technology Innovation Action Plan(Yangfan Special Project),China(No.23YF1401000) Fundamental Research Funds for the Central Universities,China(No.2232022D-25) 

出 版 物：《Journal of Donghua University(English Edition)》 (东华大学学报（英文版）)

年 卷 期：2024年第41卷第4期

页      码：447-450页

摘      要：The theory of quadratic residues plays an important role in *** 2001,Cocks developed an identity-based encryption(IBE)scheme based on quadratic residues,resolving Shamir’s 17-year-old open ***,a notable drawback of Cocks’scheme is the significant expansion of the ciphertext,and some of its limitations have been addressed in subsequent ***,Cotan and Teşeleanu highlighted that previous studies on Cocks’scheme relied on a trial-and-error method based on Jacobi symbols to generate the necessary parameters for the encryption *** enhanced the encryption speed of Cocks’scheme by eliminating this trialand-error *** on security analysis,this study concludes that the security of Cotan-Teşeleanu’s proposal cannot be directly derived from the security of the original Cocks’***,by adopting the Cotan-Teşeleanu method and introducing an additional variable as a public element,this study develops a similar enhancement scheme that not only accelerates the encryption speed but also provides security equivalent to the original Cocks’scheme.

主 题 词：identity-based encryption(IBE) quadratic residue security Cocks’IBE scheme 

学科分类：08[工学] 0839[0839] 081201[081201] 0812[工学-测绘类] 

D　O　I：10.19884/j.1672-5220.202405005

馆 藏 号：203140272...