A "Security Access System" is a fundamental component of any modern security infrastructure, designed to control and regulate entry to, and movement within, a designated area, facility, or digital resource. Its core mission is to safeguard assets, protect personnel, maintain confidentiality, and prevent unauthorized access by establishing a verifiable and controllable barrier between authorized and unauthorized entities. This system is a critical upgrade from traditional keys, offering enhanced security, flexibility, and a comprehensive audit trail of all access activities.