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smartypants wrote

claim to "strip" it are probably "accidentally" forgetting something

True, especially not just protecting against steganographic high freq noise , but imparting a color table inefficiency of color pallete to encode guid info and simple checksum.

always be wary of the "optimized color table" of compressed images.

The best solution is to have a tool rerender and image, rotate slightly, recrop slightly, add high contrast checkboard border, and over-mix clumpy white noise blended speckle and then save using your own (not the graphics card library) jpeg or png compression for color table choices.

.... not that I ever have anything to hide or anything.

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