CCA2 secure biometric identity based encryption with constant-size ciphertext  

作　　者：Yang YANG Yu-pu HU Le-you ZHANG Chun-hui SUN 

机构地区：[1]Department of Communication Engineering, Xidian University, Xi'an 710071, China [2]Department of Mathematics and Computer Science, Fuzhou University, Fuzhou 350002, China [3]Department of Mathematics Science, Xidian University, Xi'an 710071, China

出　　处：《Journal of Zhejiang University-Science C(Computers and Electronics)》2011年第10期819-827,共9页浙江大学学报C辑（计算机与电子（英文版）

基　　金：Project supported by the National Basic Research Program(973) of China (No. 2007CB311201);the National Natural Science Foundation of China (Nos. 60970119,60803149,60833008,and 61072067)

摘　　要：We propose a new biometric identity based encryption scheme （Bio-IBE）, in which user biometric information is used to generate the public key with a fuzzy extractor. This is the first Bio-IBE scheme that achieves constant size ciphertext. This is also a scheme that is secure against the adaptive chosen ciphertext attack （CCA2）. Details are presented along with a discussion of Shamir＇s threshold secret sharing and fuzzy extraction of biometrics, which is based on error correction codes. We also define a security model and prove that the security of the proposed scheme is reduced to the decisional bilinear Diffie-Hellman proposed scheme has better efficiency and stronger security （DBDH） assumption. The comparison shows that the compared with the available Bio-IBE schemes.We propose a new biometric identity based encryption scheme (Bio-IBE),in which user biometric information is used to generate the public key with a fuzzy extractor.This is the first Bio-IBE scheme that achieves constant size ciphertext.This is also a scheme that is secure against the adaptive chosen ciphertext attack (CCA2).Details are presented along with a discussion of Shamir's threshold secret sharing and fuzzy extraction of biometrics,which is based on error correction codes.We also define a security model and prove that the security of the proposed scheme is reduced to the decisional bilinear Diffie-Hellman (DBDH) assumption.The comparison shows that the proposed scheme has better efficiency and stronger security compared with the available Bio-IBE schemes.

关 键 词：Public key cryptography IDENTITY-BASED Data security BIOMETRIC ENCRYPTION 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术] TN918[自动化与计算机技术—计算机科学与技术]