Abstract
Visual Cryptography is an encryption technique which performs only encryption in cryptography, and it is used to encrypt every visual data. And this cryptography is different and unique in all cryptographic techniques, because of not performing decryption process mechanically, and that is done mechanically. In normal visual cryptography only black and white images are encrypted. In this paper we propose a different type of visual cryptography scheme for colour imagesin CMY format. And it protects the secret of the original image and no other techniques does not decrypt it except our decryption technique.
Highlights
Introduction to cryptographyCryptography is a technique which is just like an ocean it looks like simple and easy concept to define of to give example just like this “Cryptography protectscontent which is readable by humans by transforming it into unreadable format for human.And it name explains the definition and work it does is in the word cryptography and it is two parts one is "crypt" means hidden and another one is "graphy" means writing
It name explains the definition and work it does is in the word cryptography and it is two parts one is "crypt" means hidden and another one is "graphy" means writing
In cryptography technique security is in four objectives they are Confidentiality, Integrity, Non-reputation, Authentication
Summary
Cryptography is a technique which is just like an ocean it looks like simple and easy concept to define of to give example just like this “Cryptography protectscontent which is readable by humans by transforming it into unreadable format for human. The hash value is a fixed value to any file which has data, by using that value user can find that it is real or edited file These are the techniques which are used toperform encryption and decryption operations works only in text formats and other text formats and it does not encrypt the images, signatures etc. The new approaches are as follows: In first method, Shares are printed directly with colour This works just like the normal visual cryptography, and it leads to some limitations like decoded image quality is reducing and it need large pixel expansion. There are three colours Red, Green, Blue are used as channels for additive operation and another three colours Cyan, Magenta, Yellow used as channels for subtractive operation After this general procedure of visual cryptography which was applied on black & white images is applied to each and every colour channel. This method overcomes the other limitation of image quality, and it gives the resultant image in a better quality[6]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
