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?

2 Answers 2


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".

  • If you want to use command line, try 7z l -slt path/to/file.zip Commented Mar 9, 2023 at 18:38

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.

  • This is a Linux question
    – schroeder
    Commented Jul 14, 2022 at 11:51
  • Please read the question more precisely and keep note of the tags used... Commented Jul 14, 2022 at 17:34
  • right, sorry about that
    – icguy
    Commented Jul 29, 2022 at 10:23

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