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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?

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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".

  • 5
    thanks! I used: 7z l -slt file.zip and got it :) – arman Jun 7 '16 at 10:20

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