Protected Archives, Encryption and Integrity

Supported Encryption

Archiva opens and creates encrypted archives using both libarchive and the bundled 7zz (7-Zip 26.03):

• 7z with encrypted names (-mhe): besides the file data, you can encrypt the list of file and folder names. Without the password, nobody can even tell which files the archive contains.
• ZIP with AES-256: modern 256-bit encryption for .zip archives, the same Archiva uses when it creates a protected ZIP.
• Protected RAR (v4 and v5): opening password-protected RAR archives, including those with an encrypted file list (-hp).
• ZipCrypto: reading old ZIP files protected with the traditional encryption.

Passwords

[!IMPORTANT]

• Passwords are never saved to disk or written to logs: they stay in memory only, for the open archive’s window, and are discarded when you close it (⌘ W).
• If you drag an encrypted file to the Finder, Archiva asks for the password on drop and asks again if it’s wrong.

Multi-Volume Archives

Archiva recognizes archives split into several files:

• 7-Zip: archive.7z.001, archive.7z.002…
• RAR: archive.part1.rar, archive.part2.rar or archive.rar, archive.r00, archive.r01…
• Split ZIP: archive.zip, archive.z01, archive.z02…
• Split compressed TAR: archive.tar.gz.001, archive.tar.gz.002…

You can open the archive starting from any volume:

1. drag any one of the volumes into Archiva;
2. with permission for the folder (FolderAccess), Archiva finds the other volumes in the same folder and rebuilds the full list of contents.

Integrity Verification

From the File menu you can run Verify Integrity:

• Archiva decompresses all data in memory and checks its CRCs, without writing anything to disk. Verification uses 7-Zip, which always checks CRCs; libarchive only for formats 7-Zip can’t open.
• A banner shows progress and, at the end, the list of damaged or truncated files, if any.