On an SKL, how many times must the zeroize button be pressed before irreversible deletion occurs?

On an SKL, how many times must the zeroize button be pressed before irreversible deletion occurs?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: (A)

The key idea is that zeroizing an SKL is a one-shot, destructive action that permanently erases all cryptographic material and sensitive data stored in the device. When you press the zeroize button in a deliberate and authorized context, the device enters a wipe state and irreversibly clears keys, certificates, and other security information. There isn’t a multi-step confirmation sequence that requires additional presses to complete the deletion; the action is complete after that single intentional press. This design emphasizes the seriousness of the operation: you must plan and authorize the wipe before performing it, because recovery is not possible and the device cannot be simply reactivated with the same keys. In practice, you’d only trigger this when decommissioning or securely disposing of the hardware or when you are certain you won’t need any of the stored cryptographic material again and have proper authorization to do so.

The key idea is that zeroizing an SKL is a one-shot, destructive action that permanently erases all cryptographic material and sensitive data stored in the device. When you press the zeroize button in a deliberate and authorized context, the device enters a wipe state and irreversibly clears keys, certificates, and other security information. There isn’t a multi-step confirmation sequence that requires additional presses to complete the deletion; the action is complete after that single intentional press.

This design emphasizes the seriousness of the operation: you must plan and authorize the wipe before performing it, because recovery is not possible and the device cannot be simply reactivated with the same keys. In practice, you’d only trigger this when decommissioning or securely disposing of the hardware or when you are certain you won’t need any of the stored cryptographic material again and have proper authorization to do so.