If your cipher were secure, this image wouldn't have repeating patterns (2015)

Re:If your cipher were secure, this image wouldn't have repe... by wolfgang42 on Friday February 28, 2020 @11:03PM (#22448729)

Note, that illustration (Tux_ECB) is demonstrating a different problem—ECB cyphers may expose patterns across blocks—rather than reused one-time pads. One-time pads will always produce random images as their output.

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Re:If your cipher were secure, this image wouldn't have repe... by alecbenzer on Friday February 28, 2020 @11:14PM (#22448765)

Eh, it's sort of the same? You can imagine each pixel as its own message: the point is that repeatedly transforming things in a consistent but "random" way isn't actually random. The ciphertext of each pixel is "random", but the pattern when looking at all the pixels is clear.

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Re:If your cipher were secure, this image wouldn't have repe... by layoutIfNeeded on Saturday February 29, 2020 @01:57AM (#22449357)

Your more-than-one-time pad is basically an ECB mode cipher with block size = the length of the message.

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