How to set, reset, remove, and use slot access codes - Yubico

otp slotCommits a confuration to one of two programmable slots. Slot 1 corresponds to the short press of the YubiKey button, and Slot 2 the long press.The YubiKey's OTP application slots can be protected by a six-byte access code. Once a slot is confured with an access code, that slot cannot be reconfured in any way unless the correct