Document Integrity
Every signature, sealed.
When the last person signs, Geteken stamps a gold seal on your document — a tamper-evident audit certificate that permanently records every signer, every timestamp, and a cryptographic fingerprint of the file. Nothing can change the document without breaking the seal.
How to verify
Three simple steps to verify any Geteken document — no account needed.
Open the audit certificate
Every completed Geteken document includes an audit certificate page appended to the signed PDF. Open the PDF in any viewer and go to the last page — you'll find a summary of all signing events.
Check signers, timestamps & fingerprint
The certificate lists each signer's name and email address, the precise date and time of each signature, the IP address used, and a SHA-256 fingerprint of the document at the time of signing. If even a single character in the document has changed since signing, the fingerprint will not match.
Confirm against our public key
Geteken's server signs the entire audit certificate with our RSA private key. Use our public key (linked below) and standard RSA-PSS-SHA256 tools to verify the signature independently — no internet connection to Geteken required.
What the gold seal means
- 🔒
Tamper-evident
Any modification to the document after signing — even adding a space — produces a different fingerprint and invalidates the seal.
- 🕐
Timestamped
Each signing event is recorded to the millisecond and locked into the certificate. The order of signatures is preserved.
- 🔑
Independently verifiable
No Geteken account or internet access needed to verify. The public key and standard tooling are all you need.
- 📋
Full audit trail
Every signer's identity information, device, and IP address is captured in the certificate and cannot be retroactively altered.
Platform public key
For developers & offline verification
Geteken signs every audit certificate with RSA-PSS-SHA256 — an industry-standard asymmetric signature algorithm. The private key never leaves our servers. You can independently verify any signed document using our public key and widely available cryptographic tools (OpenSSL, GPG, or any standard RSA library).
Algorithm
RSA-PSS · SHA-256 · 4096-bit key
Verify with OpenSSL
-sha256 -verify pubkey.pem \
-sigopt rsa_padding_mode:pss \
-signature cert.sig \
document.pdf
PEM-encoded RSA public key — safe to share publicly.