In Code Signing, digital certificates make an important contribution to the security, integrity, and trustworthiness of software and firmware. They make it possible to identify the publisher of an application or software package. This allows users to verify that the software was actually published by the stated company rather than by an unknown or potentially malicious source.
When software is digitally signed, it is also possible to verify whether the code has been modified since it was signed. If changes are made afterward, the digital signature will no longer validate. Code Signing therefore helps protect users from manipulated or compromised software versions.