Developing An Asymmetric Cryptosystem Using Hybrid Phase Masks And Transforms To Secure Image Enciphering

Abstract

In the present time, users want to encrypt the data in such a way that only a correct key can reveal the original data. The security of the original traditional method is improved by using strong encryption algorithms. Secure communication relies not only on the algorithms, but also on the key. The length of the keys must be picked in such a way, it should be unbreakable. It should take irrational time to break the key even though using high speed of computers. But as the length of the keys goes longer, processing speed also becomes down. Optical technologies use multiple degrees of freedom to encrypt the images. Due to these life of observers and fraudsters becomes difficult. Therefore, the encryption and decryption methods are very difficult for attackers to use. Cryptosystems fall into two categories: symmetric and asymmetric cryptosystems. The asymmetric cryptosystem, based on phase and amplitude truncation, is very resistant to attack. It is always necessary to develop an asymmetric cryptosystem. If conventional random phase masks are used in a cryptosystem, both types of attacks cannot be solved. Therefore, it is important to create new types of phase masks for secure communication. Due to this, an newlineattacker will definitely fail in trying a traditional key. Therefore, optical image encryption techniques have been proposed to encrypt optical images by constructing different phase masks in different transforms. newline newline newline