In cyber security, scadenza is the end date or time after which a condition is no longer valid. It is used for things like passwords that must be changed, session tokens that expire, TLS certificates that need renewal, and access links that stop working after a set period. A scadenza is a control mechanism: it limits how long a secret, permission, or offer can be used.
It matters because expiration reduces risk. Short-lived credentials shrink the window for replay and theft, while expired certificates or tokens can block secure services if they are not renewed on time. Defenders track scadenze to rotate keys, renew certificates, and remove access automatically. Attackers also exploit the idea of urgency by sending messages that claim an offer, update, or account action will expire soon, pushing victims to click before they think. In practice, scadenza is both a security safeguard and a social-engineering trigger.