image encryption using rc4 : error in bitxor
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Hello Community ,
i work now on rc4 image encryption algorithm but i am facing a little proplem
the image dimensions is 128 * 128 uint8
& the cipher generated by my algorithm is 1 * 128 uint 8
how to get the cipher to be generated in the same dimensions of input image
i will attach compressed file contains algorithm files
Hope you can help me, Thanks in Advance
采纳的回答
Jan
2021-11-16
You instruct PRGA to reply 128 values:
Cipher = uint8(PRGA(KSA(key), size(original,2)));
I assume you want:
Cipher = uint8(PRGA(KSA(key), numel(original)));
3 个评论
Muhammad Abdulrazek
2021-11-16
Thank you very much , it work
but i have another problem : the image after encryption & decryption doesnt apear in figure or histogram ?
Jan
2021-11-16
It does appear: Do you see the blue lines at x==0 and x==1? This seems to be a confusion between the double and UINT8 types. Cast the images as UINT8 before you forward it to the function to compute the histograms.
Muhammad Abdulrazek
2021-11-16
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