重庆大学学报2017，Vol.40Issue(7)：37-42,6.DOI:10.11835/j.issn.1000-582X.2017.07.006
密文明文长度比可变的多变量公钥加密方案
Multivariate public key cryptography scheme with changeable ratio of ciphertext length to plaintext length
摘要
Abstract
Multivariate public key cryptosystem is an important method to guarantee the security of communication after quantum computer appears.There are lots of practical multivariate signature schemes,but only a few multivariate encryption schemes show up.The simple matrix encryption scheme proposed by Tao,et al.is an efficient and secure multivariate encryption scheme in PQCrypto2013.However,the ratio of length of cipher text to plain text is always 2.Cubic AB encryption scheme is a way to fix it.It uses a very wide matrix to replace square matrixes (B and C),and the elements of matrix A are random quadratic polynomials.With this method,the ratio of length of cipher text to plain text could be changed easily.Besides,rank attack cannot be used to attack this scheme.At the same time,the length of cipher text and plain text will be shorter,which could make the process of decryption faster.关键词
公钥密码体系/量子计算/多变量公钥密码体系/加密方案Key words
public key cryptography/quantum computer/multivariate public-key cryptosystem/encryption scheme分类
信息技术与安全科学引用本文复制引用
向宏,李思遥,蔡斌..密文明文长度比可变的多变量公钥加密方案[J].重庆大学学报,2017,40(7):37-42,6.基金项目
国家自然科学基金资助项目(61472054)和中央高校基本科研业务费资助项目(106112014CDJZR095501).Supported by the National Natural Science Foundation of China(61472054) （61472054）
Funda mental Research Funds for the centralUniversities (106112014CDJZR095501). （106112014CDJZR095501）
