Definition
Identity verification is the process of confirming that an individual or entity is who they claim to be. This is achieved by comparing submitted credentials against established records or by using biometric data. In practice, identity verification systems often involve multi factor authentication, requiring users to provide multiple forms of evidence to prove their identity. This is crucial for protecting sensitive data and preventing unauthorized access to systems and resources. For example, a bank might require a customer to provide a government issued ID and a selfie to access their account online. It differs from authentication, which simply confirms a user's identity after it has been established. Identity verification is a key concept tested on CompTIA Security+ and CySA+ exams, as well as in CISSP certification.