期刊论文

中文

计算机应用与软件

1000-386X

2015

32

12

310-312

10.3969/j.issn.1000-386x.2015.12.073

(2014FJ3001,2014GK3019):湖南省科技计划项目

本校为第一机构

利用混沌加密系统实现简单和加解密速度较快的特点,对涉及国家信息安全的地理空间数据进行加密。针对Logistic 混沌映射迭代所产生的结果序列进行数据加密存在的安全问题,提出相应的改进算法和基于SHA-256的密钥生成算法,并给出了用该算法对地理空间数据进行加密的流程。该算法产生的结果序列不仅没有空白窗口和稳定窗口,而且分布更均匀,随机性更好,同时拥有较大的密钥空间,更具安全性。结果表明,加密后的地理空间数据完全隐藏了点的坐标以及地理实体之间的相对位置关系,完全是混沌状态,具有很好的加密效果。

The features of chaotic encryption system including simple in implementation and fast in encoding and decoding can be used to encrypt those geospatial data involving national information security. Aiming at the security problem in encrypting the data of result sequence generated by Logistic chaotic mapping iteration,we proposed the correlated improved algorithm and an SHA-256-based key generation algorithm,and the encryption flow of geospatial data using this algorithm is given as well. The result sequence created by this algorithm has better randomness and uniform distribution without blank w...