Signing keys are cryptographic keys used to digitally sign software, documents, or messages. Their primary function is to verify authenticity and integrity, ensuring that the content has not been altered and truly originates from the claimed source. In cybersecurity, signing keys are essential for secure software distribution, as they allow users to confirm that updates or packages come from trusted vendors and have not been tampered with by attackers. The use of signing keys helps prevent the spread of malicious code and strengthens overall trust in digital communications and transactions. Proper management and protection of signing keys are crucial to maintaining security.