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A personal identification number (PIN) is a secret, usually numeric code that you memorize and enter to prove who you are or approve access. It is an authentication secret—not simply a number that identifies you.
What does PIN stand for?
PIN stands for personal identification number. In everyday use, it means a memorized secret presented during an authentication process. NIST’s glossary defines a PIN in a cardholder context as “a numeric secret that a cardholder memorizes and uses as part of authenticating their identity” (NIST glossary).
What is a PIN used for?
A system may ask you to enter a PIN to authenticate a claimant or cardholder, or to authorize access or an action. For example, a payment-card system may use a PIN as part of checking that the person presenting the card is its authorized holder. The PIN is the secret used in that check; it is not necessarily the only information the system requests.
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Is a PIN the same as a password?
A PIN is a type of memorized secret used like a password for authentication. NIST SP 800-63-4 describes a PIN as “a password that typically consists of only decimal digits” (NIST SP 800-63-4). The word “typically” is important: it describes common practice, not a rule that every PIN must contain only digits.
#1 Best Overall
- 【Wide Compatibility】Wired keypad compatible with most brands of gate openers and garage door openers (whose control board accepts a “Dry Contact” signal or works with a wired Standard Wall Button or can be controlled by a momentary push button switch). ⚠️ Note: Models whose connection protocol is Wi-Fi, learn buttons, safety sensors, rolling code are not currently supported! It can also be used with magnetic lock, strike lock and access control systems for reliable keyless entry.
- 【Wired Access Control Keypad】The keypad uses contactless RFID and PIN code technology. Simply enter a short password or tap the keyfobs (5-incl.) to open the gate without carrying a key. Easy DIY installation and programming in minutes. Works with most garage door gate openers that accept dry contact input. ideal for homeowners, staff, visitors, or delivery access needs.
- 【Safe to Use】Support up to 2000 standard users. 3-working modes “Code”, “ID Card”, “Code + ID card”, Provide more convenience for family or trusted friends. The ID card type is 125KHz EM or ID card / tag (incl. 5-keyfobs). User data is stored locally on the keypad for secure offline control—no extra software or internet required.
- 【Ideal for Outdoor Use】Coming with zinc alloy housing and LED backlight metal buttons, internal epoxy to potting, IP68 weaterproof, allowed to work outdoors long-term use in rain and sunlight. Connect the keypad's blue and purple wires to the garage door/gate opener's wall push button switch, and the red and black wires directly to the 12V DC power(not included). operates on 12V DC power and is ideal for both residential and commercial automatic gate systems.
- 【Multiple Applications】This keyless entry device is designed for the household, courtyard, warehouse, school, office building and other commercial sites. Suitable to operate the magnetic lock (normally close signal) or electric strike door lock (normally open signal). Standard Wiegand 26 output, work as an extra card reader.
Is a PIN the same as an identification number?
No. Despite the words in its name, a PIN is generally a secret used to authenticate someone, rather than a public identifier. An account number or card number can identify an account or card; a PIN is a credential the holder keeps secret. A system may ask for both an identifier and a PIN, each serving a different purpose.
How many digits does a PIN have?
There is no universal PIN length established by the cited general definitions. NIST describes PINs as typically numeric but does not specify a required number of digits in those definitions. The length and format depend on the system using the PIN.
Rank #2
- USB interface , Plug and play , Plaintext version: It displayed 123456789 on the LCD screen when you press the number keys!
- NOTE: It has voice when you press the keys! If you don't need voice. Please contact to our before you order! Sturdy and Safely , It attaches a protect case .
- Application : Bank / telecom / mobile / Unicom business hall counter, financial payment system, financial social security system, or POS terminal equipment that needs to provide password input.
- LCD tip: supports dual line character LCD ,Input keyboard: 10 numeric keys, 2 function keys, F1-F3 custom buttons.
- Cryptographic algorithms: DES and Triple DES / Customizable of Keyboard . Pls contact me before order
What does the PIN standard for payment cards cover?
For card-based systems, ISO 9564-1:2017 addresses PIN management and security in retail banking contexts. Its stated scope includes ATMs, point-of-sale terminals, automated fuel dispensers, vending machines, banking kiosks, and systems for PIN selection or change (ISO 9564-1:2017). ISO reports that a fifth-edition committee draft is under development; that draft is not a published replacement for the 2017 edition.
Quick Recap
Best Value
- 4-in-1 Keyless Entry: The keypad door lock with handle eliminates lost keys by offering 21 user codes(4-10digits), unlimited one-time codes, an interior thumbturn, and 2 backup keys. Ideal for front doors, bedrooms, garages, apartments, and offices
- Quick Secure Locking: Programmable auto-lock (10-99s) for forgetful users. Lock instantly from outside by holding any key 2s, or even faster inside with the interior thumbturn. Perfect for quick security on-the-go or ensuring immediate privacy at home
- Passage Mode: Disable auto-lock and turn the interior thumbturn to activate Passage Mode. This is ideal for moving days, parties, or anytime continuous access is required
- Bank-Level Protection: Heavy-duty zinc alloy with ANSI Grade 3 lock resists break-ins. IP55 rating withstands harsh weather. 4 AA/LR6 Alkaline batteries (not included) provide 365-day battery life with low-battery alerts for year‑round home security
- Easy to Install: This keyless entry door lock fits most left- or right-handed doors (1-3/8”–2” / 35–50 mm thick, with a 2-1/8" (54mm) bore hole). Complete with step-by-step instructions and a video tutorial, you only need a screwdriver to install it yourself—no locksmith needed
Rank #4
- Solid zinc alloy build – 2000N pressure resistance, 240-hour salt spray tested, and rated for 250,000 cycles. Built tough for weather, wear, and daily family use.
- Kid & senior friendly – Simple touchpad works for all ages; no smartphone or app needed.
- Touchscreen Keypad with Blue Backlight – No stuck buttons, no wear and tear. The illuminated keypad ensures easy code entry even in the dark, giving you reliable keyless access day or night.
- Privacy PIN Protection – Add random digits before and after your code to shield it from prying eyes. Only the correct sequence unlocks the door, keeping your entry secure from shoulder-surfers.
- Fits Most US Doors – 15-Min Install – adjustable latch for 2-3/8" or 2-3/4" backsets. Works with 2-1/8" (54mm) door holes (does NOT fit 38mm). Reversible design fits both left and right-handed doors – all hardware and wrench included.
Rank #3
- Passcode Entry: This keypad lock offers 20 access codes for family use and a temporary code for single-use guest entry
- One-Time Code: A one-time PIN code can be set for door opening and will automatically be deleted after use
- Smart Locking: Features an automatic door lock that can be set to lock in 10-99 seconds (off by default) and one-touch auto-lock by pressing and holding any key on the keypad for 2 seconds
- Long Battery Life & Low Battery Indicator: Powered by 4 AA batteries (not included), lasts up to 365 days. A red light indicator alerts you when battery level drops below 15%
- Security Deadbolt: Provides reliable home protection with its sturdy aluminum alloy construction, weather resistance (IP54), durability, anti-peeping user code protection, low battery indicator, and solid lock cylinder
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