面向遥感影像内容的多级安全授权方法

针对遥感影像数据海量的特点和对安全保密的应用需求,提出了一种面向内容的遥感影像多级安全授权方法。采用选择性的多机密区域多密级的遥感影像加密算法,在保持遥感影像格式和各项应用特性不变的基础上,分发给不同用户相同处理后的影像数据和不同权限的密钥,使不同用户通过各自密钥解密获取不同信息程度的影像数据。实验结果表明,该方法具有高机密性和高计算效率,能有效解决海量遥感影像数据的安全保密难题。

Content-Oriented Multi-level Security Authorization of Remote Sensing Images

The most confidential information of remote sensing images is related to military security and political stability, and confidential information of the regional data need to beencrypted to protect itself. On the basis of analyzing the characteristics of large quantity of remote sensing data and application requirements on security, a scheme of authorizing the use of remote sensing images based on multi-level secrurity is put forward. The same remote sensing images after encryption are distrtbuted to different level users, such as authorized user, partly authorized user, unauthorized user, but different authorization users acquire different importmant degree information after decryption through their own decryption keys. The scheme has high confidentiality and high computing efficiency encryption algorithm, and solve the difficult problems of large quantity of remote sensing data on security and secrecy.