基于NTRU的选择性加密算法研究

Study on selective encryption algorithm based on NTRU

随着云计算的发展和普及,个人、企业和国家将大量重要信息上传至云服务商,由此而来的数据安全问题便越来越受到重视。在传统云存储加密过程当中,一般是采用整体加密算法,将加密后的数据上传至云服务商,来保障隐私信息的安全。如果想要对已经加密的数据进行部分改动,则需要对整体数据重新进行加密,再将整体数据加密后产生的密文上传。然而随着加密信息数据量的不断增加,程序运行时间会大大加长。文章基于NTRU的算法的特点,设计出一种选择性加密算法,该算法使得用户在对文件进行修改后可以快速生成密文。

With the development and popularization of cloud computing, individuals, enterprises and countries upload amounts of important information to cloud providers, the data security issue has been paid more and more attention to. In the traditional cloud storage encryption process, the encrypted data is usually uploaded to the cloud provider by adopting the whole encryption algorithm to ensure the safety of privacy information. If you want to change part of encrypted data, the overall data needs to be re-encrypted and the cipher text will be uploaded again. However, it will waste a lot of time as the amount of the information data increases. Based on the characteristics of NTRU algorithm, this paper designs a selective encryption algorithm, which enables the user to create the cipher text quickly after modifying the file.