Correlation calculation decrypting for BSS-based image cryptosystem

LIN Qiu-hua; DANG Jie; YIN Fu-liang

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Correlation calculation decrypting for BSS-based image cryptosystem

更新时间：2024-10-14

- Correlation calculation decrypting for BSS-based image cryptosystem
- Issue 1, Pages: 109-114(2008)
- 作者机构：
  
  1. 大连理工大学电子与信息工程学院
  2. 大连理工大学电子与信息工程学院,辽宁,大连,116023
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP309.7
- Published：2008
- 稿件说明：
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LIN Qiu-hua, DANG Jie, YIN Fu-liang. Correlation calculation decrypting for BSS-based image cryptosystem[J]. 2008, (1): 109-114.
DOI：

LIN Qiu-hua, DANG Jie, YIN Fu-liang. Correlation calculation decrypting for BSS-based image cryptosystem[J]. 2008, (1): 109-114. DOI：

摘要

在盲源分离图像加密方法中

盲源分离解密的多幅图像在顺序和灰度值上存在不确定性

且解密强相关图像前需要去相关预处理。为了解决这两方面问题

利用密钥图像已知且与明文图像不相关的特点

提出了一种基于相关运算的图像解密新方法。该方法根据加密方程计算加密图像与密钥图像的相关阵;通过忽略较小的相关阵

得到与明文图像几乎相同的解密图像。仿真实验和性能分析结果表明

该方法解密质量好、速度快

且适于各种图像。

Abstract

For a blind source separation （BSS） based method for encrypting multiple images

the multiple decrypted im- ages by BSS may have changed order and reversed pixel values. In addition

decorrelation preprocessing must be per- formed prior to decryption of strongly correlated images. To solve the two problems

a novel method for image decryp- tion was proposed based on correlation calculation since the key images are known for legal users and are independent of the original images. Specifically

the correlation matrix between the encrypted images and the key images was calculated according to the encryption equation

the decrypted images are then obtained by ignoring the smaller correlation matrix between the original images and the key images. The results of computer simulations and performance analyses demon- strate that the proposed method can provide much higher quality and much faster speed compared to the BSS decryption

and also can directly decrypt varied images.

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