The digital signature function provided by AdobeAcrobat and AdobeReader enables people to clearly prove the true identity of the signer when creating a PDF file, which is verified by an authoritative third party, and also proves that the signed electronic file has not been illegally tampered with during network transmission.

The signing certificate of WoSignPDF file enables the government, enterprises and institutions to exchange PDF electronic files, sign electronic contracts and encrypt important confidential PDF files conveniently, safely and reliably.

WoSignPDF file signing certificate supports all versions of AdobeAcrobat and AdobeReader. WoSign is a CA certified by Adobe trusted list. The WoSign root certificate is preset in all trusted Adobe systems around the world to ensure that users can seamlessly experience trusted electronic signature documents around the world.

The PDF file signing certificate issued by WoSign can automatically obtain the global trusted identity and automatically display it as a "verified document", which greatly facilitates file readers and file authors. This file signing certificate is securely stored in USBKey, and users can use AdobeAcrobat to digitally sign and encrypt PDF files by inserting USBKey into their computers.