Have you received a digitally signed document and you want to be sure the signatures are valid, and the document’s data has not been changed?
With our signature verification service you can verify any document that has been signed with the trusted PKI digital signature. We will verify the signatories’ authenticity and data integrity to give you complete peace of mind.
Anyone can access Secured Signing’s Signature Verification Service.
If you don’t have a paid Secured Signing account you need to register below to purchase verification credits (we simply charge your credit card). You will then be able to upload your documents for verification.
Already a paid Secured Signing user, then simply login below using your Secured Signing account details.
To get started, click Verify Document button below.
Upload any documents signed with the trusted PKI Digital Signature
* Users with a paid Secured Signing account can also verify documents from Secured Signing. Simply go to 'My Documents' in 'Signed' tab
Verify Signed Documents with Your local computer
How to install Root Certificates with:
| Windows Vista
| Windows 7
| Windows 10
Open the Signed Document in Adobe Reader.
* steps 1 & 2 are required only once per computer
Secured Signing is one of the only PKI digital signing solutions available and utilising our encryption technology we are able to verify if a PKI signed document is valid and has not been changed since it was signed.
We do this by reversing the digital signing process - we take the document that you upload and using an algorithm calculate a hash value of the data. We then extract the hash value from the digital signature using the public key of the person’s digital signature. If the two hash values match then we know the signature is valid and the document has not been altered. If they don't match we consider the digital signature invalid and it either means that a different key was used to sign it, or that the data has been altered (either intentionally or unintentionally).
We charge the following fees to verify digital signatures:
Or if you're a paid user of our digital signing service you can verify unlimited documents at no cost.
We can verify any PDF document which has been digitally signed using PKI technology. The document can be of any length and you can use both our online service to verify the document or out offline service if you'd prefer a more secure approach or have a large number of documents to verify.
Promotion code entitles you to two document verifications.
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