Single-use PIN
A single-use PIN is a short numeric code tied to one person and one purpose, used to authenticate an action such as clocking in without a full password.
实际语境
PINs are a low-friction way to confirm identity for frequent, quick actions where typing a long password is impractical: exactly the case at a time clock used many times a day. On their own, short PINs are weak, because they can be shared or guessed; they become meaningful when combined with another factor, such as binding the PIN to a specific device so it cannot travel to another phone.
与 BriefQR 的关系
BriefQR pairs each operator's PIN with device binding, so the PIN only works from that person's registered device. That keeps clock-in fast while making shared logins and buddy punching far harder.