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PeaZip is a free cross-platform file archiver and encryption tool that provides an unified portable GUI for many Open Source technologies like 7-Zip, FreeArc, PAQ, UPX...
Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP files
Open and extract over 180 archive types: ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX files and more...
Features of PeaZip includes extract, create and convert multiple archives at once, create self-extracting archives, split/join files, strong encryption with two factor authentication, encrypted password manager, secure deletion, find duplicate files, calculate hashes, export job definition as script.

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FAQ / DATA SECURITY > MULTI PASSWORD ARCHIVES
different passwords for each item

Archive files with multiple passwords



MANAGE ARCHIVES WITH MULTIPLE PASSWORDS

ARCHIVES PROTECTED BY MULTIPLE PASSWORD LAYERS

what are files with multiple passwords




How to create archives with multiple passwords


Mainstream archive formats standards (including 7Z, RAR, and ZIP/ZIPX) provides file-level encryption scheme.
That architecture choice means a single archive can contain files encrypted with different passwords - ideally a different password for each file.
Also, this allows a single archive to contain both encrypted and non encrypted content.

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Updating existing archives let user provide (or omit) an arbitrary password at each instance, allowing to (potentially) protect each group of files with a different password.

PeaZip supports updating (and creating) encrypted files under following standards implementing file-level selective encryption:
  • 7Z with 7-Zip / p7zip AES256-based encryption
  • ZIP with WinZip AES256-based AE (Advanced Encryption), and ZipCrypto (legacy)
  • ARC with FreeArc AES256, Twofish256, Serpent256, and Blowfish algorithm
PEA format supports only archive-level encryption so allows / guarantee a single password being used - which may be an advantage or disadvantage depending on the user's needs.


How to extract archives with multiple passwords


Extracting data from encrypted archives requires the correct password being provided to the decryption procedure, otherwise protected data will result unreadable and extraction procedure will fail.

read file with multiple password

Consequently, when working with archives whose content is selectively protected by different passwords for different groups of files, it is needed to extract each group of archived file with its own password, in separate passes.


PeaZip supports, for extraction / decrypting, all the previously mentioned formats (read/write supported) plus following read-only supported archive types:
  • ACE with WinAce Blowfish-based encryption
  • RAR4 with AES-128 encryption, and RAR5 with AES-256 in CBC mode
  • ZIP withPKZip's AES encryption standard (format is fully supported, but encryption routine is read-only supported)
  • ZIPX with WinZip AE, based on AES-256 (encryption routine is fully supported, but format is read-only supported)

An different case of multi-password archive is when one or more existing password-protected archives are added to a new password protected archive container, and (potentially) so on, so at each iteration a different password is added.
This may be preformed in order to have different passwords and/or different types of cryptography to be applied to protect the content at each layer, but comes at cost of requiring multiple archiving iterations to build such archive - and obviously to equally require multiple extraction iterations, until the actual plain-text content is reached.
Since iterations will happen sequentially, there is no technical difficulty for any archiving utility to handle this case of double ot triple or multiple password layers, providing appropriate password at each serial archiving/extraction iteration step.


RELATED & SIMILAR PAGES
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MISSING PASSWORD

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