PDF Digital Signature-- Sign at pdf documents with USB KRY device or CA.
【Purchase PDF Digital Signature】Choose one of the online store to purchase the product.
If you need to purchase, please contact us, support@workpdf.com
【Summary】
PDF Digital Signature tool can sign the PDF document with a seal stamped and signature, it is a plug-ins of the Adobe Acrobat, the difference between our Digital Signature tool and Adobe Acrobat Signature tool is that our Digital Signature tool not only can do all the functions of Adobe Acrobat, it also can protect the seal of the signer, can sign the document by USB KEY device which store the certificate and the seal, or sign the document by CA, and can provide the development interface to the partner. It also can set the document's permissions when doing the digital signature.
【Function】
Can sign by USB KEY device, to protect the seal and the certificate.
Permissions of copying, extracting, changing or editing.
Make seal as a cursor, easy to deside the position of the stamp.
The signature is transparent if the seal is transparent.
Can sign by the CA method, used the private key file and the certificate.
Can add a stamp when sign a invisible signature, and right-click to sign at the seal image.
Protect the seal image, add a green pentagram to prevent screen copying.
Easy to delete a stamp or a signature.
Can use GIF(transparent)、JPG、PNG、TIFF、BMP、PDF image formats as a stamp.
Easy to sign, simple.
Easy integrating with CA or other systems.
【Development Interface】
We provide the development interface for the server-side calling. If you need, please send mail to support@workpdf.com or add our MSN: workpdf@workpdf.com.
【Purchasing Method】
1. One license per unit.
2. Countless licenses.
3. With USB KEY device.
【Agent】
Looking for agents, Welcome to join us!
we welcome software and solution companies who are interested in providing all or part of workpdf's product offering as a re-branded, co-branded or embedded software product. Companies who want to enjoy the benefits of this level of deep partnership with workpdf are referred to as OEM Partners.
-- Sign at pdf documents with USB KRY device or CA. 
Purchase PDF Digital Signature】Choose one of the online store to purchase the product.