Archive Verification Data: ZIP, RAR, and 7z
Recovery tools may extract a compact verification representation from an archive so candidate passwords can be tested locally. That representation is sensitive, is not the original password, and should be handled like the archive itself.
What the extracted data is for
Utilities such as John the Ripper's format helpers read archive metadata and produce a line that a compatible verifier understands. The line holds enough information to check candidates against the archive — it is not a reversible copy of the password.
The exact helper and mode depend on the format generation, the encryption, and the archive entry. A generic command copied from a forum can select the wrong parser, or silently omit the entry you need.
Output
Candidate verifier input
Secret
Treat as sensitive
Scope
Owner-authorized archive
Proof
Full extraction
A safe local workflow
Work on a copy, use software from an official or well-known source, and keep the extracted representation out of public issue trackers and chat rooms. Record the archive format and tool version next to the output so a later verification is reproducible.
If you move the representation to another machine, protect it as carefully as the archive. Delete temporary files securely once the case is closed.
- Confirm the parser supports the archive version and encryption method.
- Keep one private copy of the original archive for final verification.
- Do not test recovered candidates against accounts or unrelated files.
Know the limits
A verifier cannot tell you a password that is not among the candidates. It also cannot repair a truncated archive or bypass modern encryption. If the parser reports an invalid container, diagnose file integrity first.
Frequently asked questions
Is an archive hash the same as the password?
Which extractor should I use for ZIP, RAR, and 7z?
Can I upload an archive hash instead of the file?
Primary references
Format behavior changes over time. These references are the starting points for the technical details on this page.
Need a second opinion on this file?
Run the free local check first. If the file is healthy and you are authorized to recover it, you can compare the evidence with a specialist's supported workflow.
Related guides
For authorized owner use only. Recovery depends on the exact file and password; no outcome is guaranteed. FilesUnlock is a separate product from the recovery service that processes submissions.