...
首页> 外文期刊>Optical engineering >Optical cryptographic system employing multiple reference-based joint transform correlation technique
【24h】

Optical cryptographic system employing multiple reference-based joint transform correlation technique

机译:采用基于多参考的联合变换相关技术的光密码系统

获取原文
获取原文并翻译 | 示例
           

摘要

An optical joint transform correlation-based cryptographic system is a used to feed multiple phase-shifted encryption keys into four parallel channels along with a to-be-encrypted signal in the form of an image. The resulting joint power spectra (JPS) signals are phase-shifted and then combined to yield a modified JPS signal. Inverse Fourier transformation of the modified JPS signal yields the secured encrypted image. For decryption purpose, the received encrypted signal is first Fourier transformed and multiplied by the encryption key used in encryption. The derived signal is then inverse Fourier transformed to generate the output signal. The proposed system offers a nonlinear encryption without the involvement of any complex mathematical operation on the encryption key otherwise required in similar encryption techniques and is invariant to noise. Computer simulation results are presented to show the effectiveness of the proposed scheme with binary, as well as gray images in both noise-free and noisy environment.
机译:基于光联合变换相关的密码系统用于将多个相移的加密密钥与以图像形式的待加密信号一起馈入四个并行通道。对所得的联合功率谱(JPS)信号进行相移,然后合并以生成修改后的JPS信号。修改后的JPS信号的傅立叶反变换会产生安全的加密图像。为了解密目的,首先对接收到的加密信号进行傅立叶变换,并乘以加密中使用的加密密钥。然后将导出的信号进行傅立叶逆变换以生成输出信号。所提出的系统提供了非线性加密,而无需对加密密钥进行任何复杂的数学运算,否则在类似的加密技术中是必需的,并且该噪声不变。给出的计算机仿真结果表明,在无噪声和嘈杂的环境中,该方案具有二进制和灰度图像的有效性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号