Definition
Code signing is a security process that uses digital signatures to verify the authenticity and integrity of software code. It ensures that the code has not been tampered with since it was signed by the developer or publisher. This process works by cryptographically binding a hash of the code to a digital certificate issued by a trusted Certificate Authority. Code signing is crucial for building trust and preventing the distribution of malicious software, protecting users from security threats. For example, operating systems often check code signatures before installing new applications to prevent the execution of unauthorized or compromised software. Unlike code obfuscation, which aims to make code difficult to understand, code signing focuses on verifying its origin and integrity. This concept is frequently tested on cybersecurity certifications like CompTIA Security+ and CySA+.