Impulse attack-free four random phase mask encryption based on a 4-f optical system.
Impulse attack-free four random phase mask encryption based on a 4-f optical system.
复制标题
DOI：
10.1364/ao.48.002356
复制
发表时间：
2009-04
期刊：
影响因子：
1.9
通讯作者：
Pramod Kumar;J. Joseph;Kehar Singh
中科院分区：
文献类型：
--
作者：
Pramod Kumar;J. Joseph;Kehar Singh
基于双随机相位加密（DRPE）的光学加密方法已被证明容易受到不同类型的攻击。傅立叶平面随机相位掩模（RPM）是最重要的密钥，可以通过单脉冲函数攻击来破解。这种攻击是可行的，因为δ函数的傅里叶变换是单位函数。如果在4-f光学设置中将RPM放置在两个透镜的前面，则可以避免单位函数的形成，从而保护DRPE免受脉冲攻击。我们已经进行了数值模拟，以验证所提出的计划。该方案的抵抗力对暴力和脉冲函数攻击。实验结果验证了该方案的可行性。
Optical encryption methods based on double random phase encryption (DRPE) have been shown to be vulnerable to different types of attacks. The Fourier plane random phase mask (RPM), which is the most important key, can be cracked with a single impulse function attack. Such an attack is viable because the Fourier transform of a delta function is a unity function. Formation of a unity function can be avoided if RPMs are placed in front of both lenses in a 4-f optical setup, thereby protecting the DRPE from an impulse attack. We have performed numerical simulations to verify the proposed scheme. Resistance of this scheme is checked against the brute force and the impulse function attacks. The experimental results validate the feasibility of the scheme.