Code signing is the practice of digitally signing software, scripts, or binaries so recipients can verify the publisher and detect tampering. It matters because users and systems need better ways to distinguish trusted software from modified or malicious content.
What is Code Signing?
Code signing uses cryptographic signatures tied to a publisher certificate to prove that software came from an identified source and has not been altered after signing. It is commonly used for applications, drivers, scripts, updates, and software packages.
Why Code Signing Matters
Code signing helps establish trust in software distribution, reduce tampering risk, and support operating-system or enterprise controls that restrict untrusted code.
Code Signing vs. Encryption
Encryption protects confidentiality. Code signing protects integrity and publisher authenticity.
Frequently Asked Questions
Does code signing make software safe by itself?
No. Signed software can still be vulnerable or malicious if the signer is compromised or untrustworthy, but signing improves integrity and trust verification.
Why are stolen signing certificates dangerous?
Because attackers can use them to make malicious files appear more legitimate to users and security controls.
Related Cybersecurity Terms
- Certificate Management
- Public Key Infrastructure (PKI)
- Supply Chain Attack
- Software Bill of Materials (SBOM)
