{"id":132,"date":"2026-11-09T15:00:04","date_gmt":"2026-11-09T15:00:04","guid":{"rendered":"https:\/\/passwordideas.net\/blog?p=132"},"modified":"2026-11-09T15:00:04","modified_gmt":"2026-11-09T15:00:04","slug":"six-digit-pin-vs-password-security","status":"publish","type":"post","link":"https:\/\/passwordideas.net\/blog\/six-digit-pin-vs-password-security\/","title":{"rendered":"Six Digit PIN vs Password Security: Why Six Digits Work on a Phone"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A six-digit PIN can protect a phone because the device limits repeated guesses, and the PIN is checked locally. A website password faces a central server, possible stolen databases and reuse, so NIST sets a much longer minimum there. In the six digit PIN vs password security question, the surrounding protections matter as much as the digits.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Below I show the arithmetic, explain what NIST actually requires, and finish with steps you can take today. Technical sections are marked so you can skip them if you prefer.<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li class=\"\"><a href=\"#what-is-the-difference-between-a-phone-pin-and-a-website-password-1\">What is the difference between a phone PIN and a website password?<\/a><\/li><li class=\"\"><a href=\"#how-strong-is-a-six-digit-pin-the-arithmetic-and-its-limits-2\">How strong is a six-digit PIN? The arithmetic and its limits<\/a><\/li><li class=\"\"><a href=\"#what-does-nist-say-about-six-digit-pin-vs-password-security-3\">What does NIST say about six digit PIN vs password security?<\/a><\/li><li class=\"\"><a href=\"#why-do-phones-limit-guesses-and-where-does-that-stop-helping-4\">Why do phones limit guesses, and where does that stop helping?<\/a><\/li><li class=\"\"><a href=\"#why-can-a-website-password-be-attacked-in-ways-a-phone-pin-is-not-5\">Why can a website password be attacked in ways a phone PIN is not?<\/a><\/li><li class=\"\"><a href=\"#six-digit-pin-vs-password-security-what-should-you-do-today-6\">Six digit PIN vs password security: what should you do today?<\/a><\/li><li class=\"\"><a href=\"#frequently-asked-questions\">Frequently asked questions<\/a><\/li><li class=\"\"><a href=\"#next-steps\">Next steps<\/a><\/li><li class=\"\"><a href=\"#sources\">Sources and further reading<\/a><\/li><\/ul><\/nav><\/div>\n\n\n<div class=\"wp-block-image pwi-auto-image\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6af3ffb64fd1c&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6af3ffb64fd1c\" class=\"aligncenter size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-1-109-1-d962074cf7534ac7-1024x576.jpg\" alt=\"Illustration contrasting a phone unlocked locally with a website login checked by a remote server\" class=\"wp-image-136\" srcset=\"https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-1-109-1-d962074cf7534ac7-1024x576.jpg 1024w, https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-1-109-1-d962074cf7534ac7-300x169.jpg 300w, https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-1-109-1-d962074cf7534ac7-768x432.jpg 768w, https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-1-109-1-d962074cf7534ac7.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"what-is-the-difference-between-a-phone-pin-and-a-website-password-1\">What is the difference between a phone PIN and a website password?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The digits are only part of the story. What matters is <strong>where the secret is checked<\/strong> and <strong>what stops someone from guessing again and again<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A phone PIN is usually checked on the device itself. The device can slow down or block repeated wrong attempts. A website password is checked by a remote server, and the website&#8217;s stored copy of it can end up in a breach. The table below summarizes the contrast.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Question<\/th><th>Device PIN<\/th><th>Website password<\/th><\/tr><\/thead><tbody><tr><td>Where is it checked?<\/td><td>On the device, often with hardware support<\/td><td>On a remote server<\/td><\/tr><tr><td>What limits guesses?<\/td><td>Delays, throttling or lockouts built into the device<\/td><td>Online rate limits, which do not help if a stored database is stolen<\/td><\/tr><tr><td>Extra risks<\/td><td>Someone watching you type, or physical access to the device<\/td><td>Phishing, reuse across sites, breached credentials, stolen password hashes<\/td><\/tr><tr><td>NIST SP 800-63B-4 (finalized July 2025)<\/td><td>For a local activation secret: at least 4 characters required, 6 recommended, numeric allowed, no more than 10 consecutive failures<\/td><td>At least 15 characters if the password is the only factor; at least 8 if used only inside multifactor authentication<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A device passcode and NIST&#8217;s term <em>activation secret<\/em> are related but not identical. NIST uses the second term for a secret that unlocks an authentication key stored locally.<\/p>\n\n\n<div class=\"wp-block-image pwi-auto-image\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6af3ffb6510a9&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6af3ffb6510a9\" class=\"aligncenter size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-2-109-2-c455ac2627452f72-1024x576.jpg\" alt=\"Grid of dots representing the one million possible combinations of a six-digit PIN\" class=\"wp-image-138\" srcset=\"https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-2-109-2-c455ac2627452f72-1024x576.jpg 1024w, https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-2-109-2-c455ac2627452f72-300x169.jpg 300w, https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-2-109-2-c455ac2627452f72-768x432.jpg 768w, https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-2-109-2-c455ac2627452f72.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"how-strong-is-a-six-digit-pin-the-arithmetic-and-its-limits-2\">How strong is a six-digit PIN? The arithmetic and its limits<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A random six-digit PIN, including leading zeros, has 10 to the power of 6 possibilities. That is 1,000,000 combinations, or about 19.9 bits of theoretical <strong>entropy<\/strong>. Entropy measures how many equally likely possibilities an attacker would have to consider.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As an illustration, if a PIN was chosen uniformly at random and the attacker knows nothing else, ten guesses have at most a 10 in 1,000,000 chance (0.001%) of succeeding. This is not a measured phone-compromise probability. It only shows why a small guess limit makes a short random number workable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The assumptions matter:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Uniform choice.<\/strong> Birthdays, repeated digits and patterns such as 123456 break it. NIST encourages blocking common activation secrets like that one.<\/li>\n\n\n\n<li><strong>A limit on guesses.<\/strong> Without one, 1,000,000 possibilities is a small search.<\/li>\n\n\n\n<li><strong>Generator settings.<\/strong> Excluding repeats or sequences removes values from the pool, so it does not raise the entropy. It only avoids obviously weak picks.<\/li>\n\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/passwordideas.net\/password_entropy_calculator\" title=\"Password Entropy Calculator\">Password Entropy Calculator<\/a> uses length multiplied by the base-2 logarithm of the character pool, and it does not store or transmit input. Type six made-up digits, never your real PIN, to see a figure near 19.9 bits. Treat it as theoretical entropy, not an account-safety rating, just as <a href=\"https:\/\/passwordideas.net\/blog\/high-password-entropy-but-weak-strength-score\/\" title=\"High Password Entropy But Weak Strength Score\">high password entropy can still come with a weak strength score<\/a>.<\/p>\n\n\n<div class=\"wp-block-image pwi-auto-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-3-109-3-bc0ab641c8a7c8c5-1024x576.jpg\" alt=\"Two doors representing NIST&apos;s separate rules for local PINs and central website passwords\" class=\"wp-image-140\" srcset=\"https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-3-109-3-bc0ab641c8a7c8c5-1024x576.jpg 1024w, https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-3-109-3-bc0ab641c8a7c8c5-300x169.jpg 300w, https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-3-109-3-bc0ab641c8a7c8c5-768x432.jpg 768w, https:\/\/passwordideas.net\/blog\/wp-content\/uploads\/2026\/11\/six-digit-pin-vs-password-security-image-3-109-3-bc0ab641c8a7c8c5.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"what-does-nist-say-about-six-digit-pin-vs-password-security-3\">What does NIST say about six digit PIN vs password security?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">NIST SP 800-63B-4 separates two situations, and mixing them up causes most of the confusion.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"section-2-detail-1\">Local activation secrets<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When a secret is used locally to unlock an authentication key, NIST requires at least four characters and recommends at least six. It allows an all-numeric PIN. It also requires a mechanism that limits consecutive failed attempts to no more than 10. These are requirements for authenticators in NIST&#8217;s defined setting. They do not claim that every phone follows an identical ten-try policy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"section-2-detail-2\">Centrally verified passwords<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When a password is verified by a server, NIST requires a minimum of 15 characters if the password is the only factor. It permits a minimum of 8 if the password is used only within a multifactor process. That second number is a verifier requirement. It is not advice to pick an eight-character password whenever two-factor authentication is offered.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NIST also calls for checking proposed passwords against commonly used or compromised values. A six-digit PIN should not stand in for an ordinary website password.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"why-do-phones-limit-guesses-and-where-does-that-stop-helping-4\">Why do phones limit guesses, and where does that stop helping?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Apple&#8217;s platform security documentation describes escalating delays after incorrect iPhone passcodes. Erasing the device after ten consecutive incorrect attempts depends on the Erase Data option being turned on. Android&#8217;s Gatekeeper documentation describes hardware-backed verification and throttling of consecutive failures. Details vary by device model and configuration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Neither example proves a short PIN is safe without those protections. If you turn off the lock, disable the limits, or share the PIN, the six digits stand alone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practical steps for your phone:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pick a PIN that is not a birthday, an address or a pattern. The <a href=\"https:\/\/passwordideas.net\/pin_generator\" title=\"PIN Generator\">PIN Generator<\/a> creates random numeric PINs of 3 to 12 digits, with options to avoid repeating or sequential digits, and it runs in your browser using cryptographically secure randomness.<\/li>\n\n\n\n<li>Consider a longer passcode if your device allows one.<\/li>\n\n\n\n<li>Keep the lock screen limits and updates enabled.<\/li>\n\n\n\n<li>Shield the screen when you type in public.<\/li>\n\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Generate your own value, and do not use the same PIN for a phone, a bank card and a door code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"why-can-a-website-password-be-attacked-in-ways-a-phone-pin-is-not-5\">Why can a website password be attacked in ways a phone PIN is not?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This section is for IT and web development beginners.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Websites usually do not store your password directly. They store a <strong>hash<\/strong>, a one-way scrambled version produced by a hashing function. NIST calls for salted, suitably hashed storage. A <strong>salt<\/strong> is a random value added so identical passwords do not produce identical hashes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Online rate limits can slow guessing through the login form. But if a hash database is stolen, guesses can be made offline, away from the site&#8217;s attempt limit. The result then depends on the password&#8217;s strength and the site&#8217;s storage practices. OWASP recommends slow password-hashing schemes and warns against fast general-purpose hashes for storing passwords. I do not quote a time-to-crack figure here, because a responsible number needs a stated hashing scheme, hardware and attack method.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Other risks have nothing to do with combination counts: phishing pages, reused passwords and credentials exposed in earlier breaches. If you build sites, the <a href=\"https:\/\/passwordideas.net\/password_hash_generator\" title=\"Password Hash Generator\">Password Hash Generator<\/a> shows how bcrypt, a deliberately slow hash with an adjustable cost factor, differs from fast hashes such as SHA-256 or MD5, which the tool labels as unsuitable for password storage. It runs in your browser, so nothing is uploaded.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"six-digit-pin-vs-password-security-what-should-you-do-today-6\">Six digit PIN vs password security: what should you do today?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Follow these steps in order. None of them requires technical skill.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Keep a random PIN on your device.<\/strong> Avoid dates and patterns, and keep the device&#8217;s guess limits switched on.<\/li>\n\n\n\n<li><strong>Give every website a long, unique password.<\/strong> Use the <a href=\"https:\/\/passwordideas.net\/\" title=\"Secure Password Generator\">Secure Password Generator<\/a> for random passwords, or the <a href=\"https:\/\/passwordideas.net\/passphrase_generator\" title=\"Passphrase Generator\">Passphrase Generator<\/a> for multi-word options. The UK NCSC suggests three random words as one memorable method, so check the result against the site&#8217;s own length rules and the 15-character figure above.<\/li>\n\n\n\n<li><strong>Store them in a reputable password manager.<\/strong> You then remember one strong secret instead of dozens.<\/li>\n\n\n\n<li><strong>Check for exposure.<\/strong> The <a href=\"https:\/\/passwordideas.net\/password_leak_checker\" title=\"Password Leak Checker\">Password Leak Checker<\/a> queries the Have I Been Pwned service using k-anonymity, which means only the first five characters of a hash are sent. Do not type a password into any site you do not trust.<\/li>\n\n\n\n<li><strong>Turn on two-factor authentication or passkeys.<\/strong> A <strong>passkey<\/strong> is a sign-in method where a private key on your device proves who you are. W3C WebAuthn describes local user verification, which may be a PIN or a biometric, authorizing the credential, so the PIN is not sent to the website as a password.<\/li>\n\n\n\n<li><strong>Change a password only for a reason<\/strong>, such as a breach or suspected compromise, not on a fixed schedule.<\/li>\n\n\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">If you have many accounts to fix, read how to <a href=\"https:\/\/passwordideas.net\/blog\/generate-unique-passwords-for-multiple-accounts-at-once\/\" title=\"Generate Unique Passwords for Multiple Accounts At Once\">generate unique passwords for multiple accounts at once<\/a>. The free <a href=\"https:\/\/passwordideas.net\/downloads\/password-safety-checklist\" title=\"Password Safety Checklist (PDF)\">Password Safety Checklist<\/a> is a printable list of actions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"frequently-asked-questions\">Frequently asked questions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"faq-1\">Is a six-digit PIN safe for my phone?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It can be, when the PIN is random, not a birthday or pattern, and the device&#8217;s protections stay enabled. Those protections are delays, throttling or lockouts after repeated wrong attempts. Device models and settings differ, so check what yours does.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"faq-2\">Can I use a six-digit PIN as a website password?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. NIST SP 800-63B-4 requires at least 15 characters for a centrally verified password used as the only factor. A six-digit number is far below that, and websites face stolen hashes, phishing and reuse.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"faq-3\">Does NIST allow an eight-character password with multifactor authentication?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">NIST permits a minimum of eight characters only when the password is used within a multifactor process. That is a minimum for verifiers, not a recommendation. A longer, unique password is still the better choice.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"faq-4\">Is a six-digit verification code the same as a PIN?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. A one-time code is short-lived and sent or generated for a single sign-in. A PIN is a reusable secret. Do not treat the two as interchangeable, and never share a one-time code with anyone who contacts you.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"faq-5\">How does a passkey use my PIN?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">With WebAuthn, your device may ask for a PIN or biometric locally to approve use of a public-key credential. The website receives a cryptographic proof, not your PIN, so it is a different model from a typed website password.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"faq-6\">Should I change my phone PIN regularly?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not on a fixed schedule. Change it if you suspect someone has seen it, if the phone was lost or borrowed, or if the PIN is guessable. Choose a new random value from a generator instead of a variation of the old one.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"faq-7\">Does excluding repeated or sequential digits make a PIN stronger?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It avoids obviously weak picks, but it shrinks the set the generator draws from, so it does not raise theoretical entropy. A generated six-digit PIN with exclusions has fewer than 1,000,000 possible values.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"next-steps\">Next steps<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The six digit PIN vs password security comparison is not about six digits being strong in general. A PIN works on a phone when the device checks it locally and limits repeated guesses. A website password needs length, uniqueness and protection from breaches and phishing. Recap: use a random device PIN with limits on, a long unique password per site, a breach check, and two-factor authentication or passkeys where offered.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related tools and resources on Password Ideas:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/passwordideas.net\/pin_generator\">PIN Generator<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/passwordideas.net\/password_entropy_calculator\">Password Entropy Calculator<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/passwordideas.net\/password_leak_checker\">Password Leak Checker<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/passwordideas.net\/passphrase_generator\">Passphrase Generator<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/passwordideas.net\/blog\/high-password-entropy-but-weak-strength-score\/\">High Password Entropy But Weak Strength Score<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/passwordideas.net\/downloads\/password-safety-checklist\">Password Safety Checklist (PDF)<\/a><\/li>\n\n\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sources\">Sources and further reading<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/pages.nist.gov\/800-63-4\/sp800-63b.html\" target=\"_blank\" rel=\"noopener\">NIST Special Publication 800-63B<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/support.apple.com\/en-gu\/guide\/security\/sec20230a10d\/web\" target=\"_blank\" rel=\"noopener\">Passcodes and passwords &#8211; Apple Support (GU)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/pages.nist.gov\/800-63-4\/\" target=\"_blank\" rel=\"noopener\">NIST SP 800-63 Digital Identity Guidelines<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/pages.nist.gov\/800-63-4\/sp800-63b\/passwords\/\" target=\"_blank\" rel=\"noopener\">Strength of Passwords<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cheatsheetseries.owasp.org\/cheatsheets\/Password_Storage_Cheat_Sheet.html\" target=\"_blank\" rel=\"noopener\">Password Storage &#8211; OWASP Cheat Sheet Series<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.w3.org\/TR\/webauthn-3\/\" target=\"_blank\" rel=\"noopener\">Web Authentication: An API for accessing Public Key Credentials &#8211; Level 3<\/a><\/li>\n\n\n<\/ul>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Six digit PIN vs password security comes down to who checks the secret and what limits guesses. Learn why a PIN suits a phone but not a website login.<\/p>\n","protected":false},"author":1,"featured_media":135,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[61,44,50,10,48,60,62],"class_list":["post-132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-password-strength-and-entropy","tag-device-passcode","tag-nist-sp-800-63b","tag-passkeys","tag-password-entropy","tag-password-security","tag-six-digit-pin","tag-website-passwords"],"_links":{"self":[{"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/posts\/132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/comments?post=132"}],"version-history":[{"count":6,"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/posts\/132\/revisions"}],"predecessor-version":[{"id":184,"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/posts\/132\/revisions\/184"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/media\/135"}],"wp:attachment":[{"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/media?parent=132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/categories?post=132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/passwordideas.net\/blog\/wp-json\/wp\/v2\/tags?post=132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}