CRYPTYRUS

Encryption and secure physical backup on paper

A single sheet, protected by a passphrase. You may print several copies and keep them in different places: each is useless without the passphrase.

To check before generating

You can fix these points, or generate the sheet anyway.

    The secret is spread across several sheets. A defined number must be gathered to reconstruct it: no passphrase is needed. A single sheet reveals absolutely nothing.

    Scan or paste one sheet's data. Cryptyrus automatically recognises whether it is a single sheet or a split, and asks for what's missing.

    Checksum

    Format
    Protection
    Per sheet
    Checksum

    Cryptyrus · versioned QRS format · AES-256-GCM · Shamir sharing · local processing