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I need to encrypt color images, using logistic chaotic map. Could you please recommend an algorithm for this?

All the articles that I've found on the Internet are completely unclear.

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  • $\begingroup$ Did you see this paper? Or were you looking for an actual implementation? $\endgroup$ – Ella Rose Apr 7 '16 at 22:50
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    $\begingroup$ @E. Rose: the paper contains: "The proposed (sic) is a simple block cipher with block size of 8-bit and 256-bit secret key". The drawing below that shows something that could be block cipher in CFB mode, and an 8-bit block cipher in CFB mode can't be safe. So the system in the paper is unsafe, OR the paper is unclear (with OR being used in it's inclusive form). $\endgroup$ – fgrieu Apr 8 '16 at 3:47
  • $\begingroup$ @fgrieu duly noted, and thank you for the observation. That was basically the extent of what I found searching for logistic map encryption. This was the first I had heard of it. I only skimmed the paper in question, to be honest I was assuming OP had already seen it and was looking for something else anyways. $\endgroup$ – Ella Rose Apr 8 '16 at 3:53
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    $\begingroup$ Correction: the drawing is not quite CFB, even if you notice that the top feekback is cancelled: there are 2 bytes of key input from a 256-byte circular buffer at each step. I'm leaning towards unclear and unsafe. @Yuriy N.: you may need to encrypt a color image; but why would you need to use a logistic chaotic map for that purpose? If that's an assignment, can you politely repel the "logistic chaotic map" part of it as unacademic, and replace it by something that is? $\endgroup$ – fgrieu Apr 8 '16 at 4:14
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    $\begingroup$ other than randomness tests of output, chaotic ciphers have no proof of security and should be avoided. $\endgroup$ – kodlu Apr 8 '16 at 8:27

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