What is the impact of correlation test in Image encryption ?

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Abbas Cheddad

As far as image encryption is concerned, correlation test is not sufficient. It is normally coupled with other tests, see an example of these tests in the paper:

Article A hash-based image encryption algorithm

Sudeept Singh Yadav

Correlation test is also a part of image encryption, we can also perform NPCR, UAIC and MSE test for image encryption.