Further note that the encryption algorithm used by zipcloak and ZipCrypto is very weak. 1.Start by navigating to Terminal by either finding the Utility inside of Finder under Utilities, or by pressing Cmd + Space bar to activate Spotlight search.
Note that filenames within ZIP archives are not encrypted see Filenames display without entering the password when an encrypted Zip file is opened for more information and a workaround. > Set password.) or PeaZip (Select ZIP files > Convert > Enter password / keyfile (optionally set algorithm to ZipCrypto under the Advanced tab for compatibility with Windows' built-in ZIP handling)). Furukawa crafted a patch for zipcloak that adds a password option, so batch processing is much easier:Ĭ:\>for %f in (*.zip) do zipcloak -p password %fĭownload the patch and/or binary from the above link or this local cache.īatch password-protecting existing ZIP files can also be done with WinRAR (Select ZIP files > Tools > Convert archives > Compression. Batch encrypt existing ZIP files # zipcloak encrypts all unencrypted entries in a ZIP file, but it does not support wildcards in filenames (e.g., *.zip) for batch processing, nor does it allow passing the password in an argument one must enter and reenter the password manually:
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