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23-09-2017, 07:14 PM

I am Jorge and I would like to get the MATLAB code. Thanks.

jaseela123d · 25-09-2017, 10:49 AM

Cryptography is the essential subject for the security of network information to protect important data. Although following the symmetric cryptosystem for which the participations in the communication maintain exactly the same keys, the special one for the algorithms of encryption and decryption proposed in this document is based on the operational objectives, the quantum image. First, it extracts the properties of the grayscale and the position of the quantum grayscale image which gives the image storage expression in quantum states. Along with the geometric transformations in classical images, this article realizes the geometric transformations of quantum image through the design of quantum circuits. Finally, through a combination of the previous proposals, the algorithms of encryption and decryption in gray scale quantum images are finally achieved, which could guarantee the confidentiality and security of the information in the delivery. The algorithms belong to the application of geometric transformations of quantum images, in addition, the new explorations for the investigations of cryptography of quantum images.

Quantum cryptography is the science of exploiting quantum mechanical properties to perform cryptographic tasks. The best known example of quantum cryptography is the distribution of the quantum key, which provides a theoretically secure solution to the key exchange problem. The currently used public key encoding algorithms and signature schemes can be broken by quantum adversaries. The advantage of quantum cryptography lies in the fact that it allows to complete several cryptographic tasks which are shown or conjectured to be impossible using only classical (ie non-quantum) communication.

For example:- it is impossible to copy coded data into a quantum state and the very act of reading coded data in a quantum state changes the state. This is used to detect spying in the distribution of the quantum key.

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