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I wonder if the watermark can only be decrypted by zoom and is unique every time, if not, you could fake it and blame someone else intentionally. From the artic

I wonder if the watermark can only be decrypted by zoom and is unique every time, if not, you could fake it and blame someone else intentionally. From the article, it seems so but I hope it’s done properly.

a-dub 6y ago
techniques that i've seen in the past are indistinguishable from noise unless you have the correct key. that is, they use the fact that a key is a psuedorandom bitstream and that audio streams often have psuedorandom noise so ciphertext is ideal for adding into the noise. i think i presented this paper for a course journal club from two decades ago, a decade ago on the topic: https://www.sciencedirect.com/science/article/abs/pii/S0165168498000140 https://www.sciencedirect.com/science/article/abs/pii/S01651...
- ImpossiblePizza 6y ago
  The whole issue seems to be dedicated to watermarking, but relevant to this discussion is also this article: "The basic principle borrows from spread spectrum communications. It consists of addition of an encrypted, pseudo-noise signal to the video that is invisible, statistically unobtrusive, and robust against manipulations." https://www.sciencedirect.com/science/article/pii/S0165168498000115 https://www.sciencedirect.com/science/article/pii/S016516849...