how can i modify this code to encrypt an image?what is an encryption key?how can i include this key to generate pseudo random sequence?

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anna ann
anna ann am 18 Nov. 2016
I=double(imread('filename')); [m n]=size(I); for i=1:m for j=1:n r=randi(m,n,255) end end p=xor(I,r)

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