Can the signer automatically receive the message that the electronic signature PDF document has been modified?

After the document with electronic signature is changed, you can see the signs of change, because the hash value of its electronic signature has changed, but the issuer cannot automatically receive the information that the document has been changed. Only when he saw the document did he know that it had been modified.

1. Open the PDF document and select Sign Document in the Signature option.

2. When the following dialog box appears, you can check the small box and stop displaying the prompt message. After clicking OK, you can draw a small box where you want to place the electronic signature.

3. Please fill in the digital information and add relevant information according to the picture below. The names of institutions, departments and organizations in ascii code cannot be filled in Chinese, but Chinese names and organizations can be filled in on the right.

Fourth, the next step is to fill in the digital information and add relevant information according to the following example. The name, organization department and institution name in ascii code cannot be filled in Chinese, but the Chinese name and institution can be filled in on the right.

5. Next, select the storage location and add the password for signing the document. Can be set at will, not less than 6 characters.

6. pdf electronic signature can be realized after completion.

Functions of pdf files:

Portable document format is an electronic file format. This file format has nothing to do with the operating system platform, that is, PDF files are common in Windows, Unix and Apple's Mac OS operating systems.

This feature makes it an ideal document format for electronic document distribution and digital information dissemination on the Internet. More and more e-books, product descriptions, company announcements, online materials and emails are using PDF files.