基于广义混沌同步系统的数字图像非对称安全通讯方案
首发时间:2005-02-25
摘要:基于广义混沌同步系统和离散Sinai映射, 提出了具有非对称密钥的数字图像安全通讯方案. 方案将常规的8位真彩图像或索引图像转换为不可识别的乱码, 然后保存为16位字长的数字图像进行发送. 接收方利用非对称密钥对收到的密文进行数据源真伪性认证和解密. 方案能对计算机所能识别大部分图像格式进行加密, 并无损地恢复原始图像. 方案适用于网络数字通讯, 对方案的密钥空间、密钥参数敏感性和加密图像的相关性等分析表明该方案具有较高的安全性.
关键词: 广义混沌同步 Sinai映射 图像混淆 非对称密钥 网络通讯
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A Non-symmetric Digital Image Encryption Scheme Based
Abstract:Based on generalized chaos synchronization (GCS) system and sinai mapping, a non-symmetric digital image encryption scheme is presented. The scheme transfers ordinary RGB digital images with 8 bit into digital image with 16 bit, and then makes it become un-recognizable disorder codes. Alomost all formatted digital images recognized by computers can be encrypted and decrypted in terms of the scheme. Another feature of the scheme is its data origin authentication function. Even a receiver cannot communicate with sender of a ciphertext, the receiver can still confirm whether the received data are altered by intruders. The scheme can be applied in the Internet digital communications. The analysis of the key space, sensitivity of key parameters, and correlation of encrypted images imply that this scheme has good security.
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No.1592109041109297****
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