Security

How can I change the certificate of the Dynamic Web TWAIN Service?

To replace the default certificate, the steps are:

• Generate a certificate for 127.0.0.1 with an RSA private key
• Rename the certificate to server.pem and the private key to server_key.pem
• Replace the old keys in the cert folder in the service’s installation folder
• Restart the service

You can also pack the two files into a zip file and use the configuration page to update.

Appendix

How to Generate the Certificate with acme.sh?

Run the following command to apply for an SSL certificate.

acme.sh --issue -d <your-domain> --keylength 2048

Then, you can find the certificate named fullchain.cer and the private key named your-domain.key in the output folder.

What are the Files in the cert Folder

• default keys
  • server.pem
  • server_key.pem
• keys for local.dynamsoft.com (encrypted, get the latest from demo site)
  • server.pem.ldsc
  • server_key.pem.ldsc
• keys for Remote Scan’s proxy server after installation (encrypted, get the latest from the domain binding page)
  • server.pem.ldwtc
  • server_key.pem.ldwtc

Original post creation date: Nov 29, 2021

Last modified date: Oct 11, 2025