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As we know zip files supports a simple password-based symmetric encryption system and some vendors use other algorithms. I used the zipinfo command in Linux but it doesn't say what encryption algorithm is used. How can I find that out?
7Zip archiver (freeware) has an info button that among other useful things tell you the encryption type an archive is using.
As a general note, .Zips usually use something called "ZipCrypto Deflatte".
7z l -slt path/to/file.zip
If you're on Windows in Total Commander you can press Ctrl+PageDown to enter the archive. Right click > Properties on any file will tell you the encryption type.