PINkoodide
PINkoodide, or PIN codes, are numeric personal identifiers used to verify a person’s identity during access to systems or services. They are widely used with payment cards (ATMs and point-of-sale terminals), mobile devices (SIM and screen locks), and smart cards. PINs are designed to be known only to the user and not transmitted in clear form.
Typical formats: four digits dominate globally, though many systems allow six digits or longer. In card payments,
Security considerations: PIN disclosure can occur through shoulder surfing or smudge attacks. If a PIN is compromised,
Alternatives and context: PINs are commonly compared with passwords and can be combined with biometrics or