Security
Docuplete computes and records a SHA-256 hash of every completed PDF at the moment of generation. Any modification to the document — even a single byte — changes the hash and is immediately detectable.
What it covers
Technical details
SHA-256 produces a unique 256-bit fingerprint of any file. Even changing a single character produces a completely different hash — making any modification to the document immediately detectable.
The hash is computed at the moment Docuplete generates the completed PDF — before it is delivered or downloaded. This creates an immutable record of the original.
The SHA-256 hash is printed on the signing certificate page appended to every document. Anyone with the document can verify its integrity without needing system access.
Verify any document via the Docuplete verification endpoint — provide the document token or SHA-256 hash to confirm the file is unchanged since generation.
SHA-256 and RFC 3161 timestamps work together: the hash proves what the content was, the timestamp proves when it existed. Together they provide tamper-evidence across both dimensions.
SHA-256 is an open, widely audited cryptographic standard (FIPS 180-4). Anyone can recompute the hash of a Docuplete PDF using any SHA-256 tool and compare it against the recorded value.
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