What is Code Signing?#
Using certificates issued by trusted Certificate Authorities, code signing attaches cryptographic signatures to software. Operating systems verify the signature to alert users if files have been modified.
Everyday Analogy#
A wax seal placed on an official parchment document, proving it originated from the royal court and was never opened in transit.
Practical Applications#
- Signing Windows and macOS software installers to bypass security warnings
- Verifying the authenticity of WordPress updates and theme packages