1. Buy or create a digitally signed certificate file.

There are tools and software that can make digital signature certificates, such as openssl, but if you sign yourself, you can't verify the signature on someone else's machine. People won't install your certificate unless they trust you.

2. Use tool software to digitally sign exe or any other file. Can be a free UI tool, such as kSign；; It can also be similar to signtool (Microsoft's command line tool); You can also operate the wizard programs of the system (such as the wizard for installing, importing and digitally signing signed files on Microsoft Windows). Under xNix, you can use GnuPG(gpg) to go from certificate to signature at one time.

3, if you do program development, you can use command-line tools such as signtool to write batch processing, and then add your own project automatic signature during the make process.