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Code Signing

Security

Malware Secure Boot Digital Signature Supply‑chain Attack

Signing software so users can verify it’s real and unchanged.

Definition

Code signing means software is digitally signed so devices can verify it came from the real publisher and wasn’t modified.

In plain English Signing software so users can verify it’s real and unchanged.

Why this matters

Why it matters: It helps prevent installing tampered software or malware disguised as an update.

Example

Example: Your phone refuses to install an app that isn’t properly signed.