Code signing protects both companies and users against damage due to software manipulation in executable files. The underlying process is based on the so-called public key infrastructure (PKI), which is also used for S/MIME or TLS/SSL certificates. It enables users to check the authenticity and validity of software before installation. By doing so, code signing certificates provide application security.
Thanks to the digital signature, users are able to make an informed decision about whether to execute the relevant software or file and can check its authenticity. As a rule, users should not trust unsigned code or applications as nobody can be held liable for any damages or errors in the application if the code has been manipulated by third parties.
Using code signing certificates, which are issued by independent certificate authorities like DigiCert, GlobalSign or Sectigo, the signature marks software applications with a "digital protection label" of sorts. This holds a number of competitive advantages:
Software companies visibly communicate their identity.
The integrity of digital products is guaranteed.
Code signing ensures more application security and leads to higher company reputation amongst users.