Which of the following are the supporting techniques for the single badge system?

• A. Personal recognition, signature/credential check, EAL, telephone/radio verification.
• B. Vehicle inspection, background check, random search, hand-to-hand greeting
• C. Passwords, tokens, time-based codes, fingerprint
• D. Visual inspection only

Answer: (A)

Single badge systems rely on one credential, but entry security is strengthened by layered verification that confirms who the person is and what they’re authorized to access. The combination of personal recognition, checking a signature or credential against records, consulting an Electronic Access List (EAL) to confirm permissions, and performing telephone or radio verification provides real-time, human- and system-based validation at the point of entry. This mix helps catch badge misuse or outdated permissions by adding multiple, independent checks beyond the badge itself, while still allowing efficient processing for authorized personnel.

Other options mix in procedures that are not standard parts of validating a single badge at the entry point, or describe methods that belong to broader or different security controls (like general screening or biometric authentication), which isn’t the same as the supported techniques specific to the single badge system.