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From: Rich <rich@example.invalid>
Newsgroups: sci.crypt
Subject: Re: [file2png] Convert (encrypted) binary data to .png images and back
Date: Mon, 30 Dec 2024 20:35:58 -0000 (UTC)
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Stefan Claas <pollux@tilde.club> wrote:
> Hi all,
> 
> here is a Python3 implementation of my file2png program, available 
> here: https://github.com/706f6c6c7578/file2png
> 
> Hope you find it useful, when for example uploading such images to 
> platforms like X, which does not compress .png images, as I have 
> tested!

PNG compression is lossless, so it should not matter if the PNG is 
compressed, you should get back the same bytes that went in.

Now, if instead you mean "rescale" (reduce/increase size) or other 
transformations (RGBI to RGB or RGB to indexed) then those 
transformations may alter the content such that you do not get back 
what you put in.