zhanghai / zhanghai/MaterialFiles

7-zip archives with AES256 encryption can't be opened

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Since Jun 1, 2026.

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Description

7-zip archives with AES256 encryption can't be opened (java8.nio.file.FileSystemException: /: The archive header is encrypted, but currently not supported):

Image

The archive that I used is the following and contains a text file (the password is password, for extreme security). I put it in a zip file otherwise I can't upload it on Github:

archive.zip

I created the archive with Ark with the following settings:

Image

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