摘要
针对电子病历的保密性问题,提出一种混沌映射与GF(2~4)域乘法运算相结合的电子病历图像加密算法。通过对电子病历的灰度图像使用SHA-1算法产生的哈希值作为病历摘要来监测电子病历的传播。利用二维图像展成一维向量后的无重复置乱算法结合GF(2~4)域乘法运算的扩散算法对病历图像进行加密。Lorenz混沌映射产生相应的密码。实验结果表明:算法的安全性高,有效保证电子病历在传递过程中的安全性。
For the confidentiality problem of electronic medical records, we proposed the encryption algorithm of electronic medical records image based on chaotic mapping and multiplication of GF（2-4） domain. For grayscale images of electronic medical records, we took the hash value generated by SHA-1 algorithm as the medical record summary to monitor the spread of electronic medical record. After the two-dimensional image was expanded into one-dimensional vector, the non-repetitive scrambling algorithm was combined with the diffusion algorithm of multiplication algorithm in GF（2-4） domain to encrypt the medical record image. Lorenz chaotic map generated the corresponding cryptogram. The results show that the algorithm has high security and effectively ensures the safety of electronic medical records in the process of transition.
作者
刘西林
严广乐
Liu Xilin;Yan Guangle(Business School,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《计算机应用与软件》
北大核心
2018年第12期303-307,共5页
Computer Applications and Software
基金
上海高原学科建设项目管理科学与工程(10-17-303-004)
