{"id":238,"date":"2016-05-23T08:44:14","date_gmt":"2016-05-23T15:44:14","guid":{"rendered":"https:\/\/blogschapman.wpenginepowered.com\/information-systems\/2016\/05\/23\/passphrases-and-the-top-20-commonly-used-passwords-on-linkedin\/"},"modified":"2026-07-23T20:13:52","modified_gmt":"2026-07-23T20:13:52","slug":"passphrases-and-the-top-20-commonly-used-passwords-on-linkedin","status":"publish","type":"post","link":"https:\/\/blogs.chapman.edu\/information-systems\/2016\/05\/23\/passphrases-and-the-top-20-commonly-used-passwords-on-linkedin\/","title":{"rendered":"Passphrases and the top 20 commonly used passwords on LinkedIn"},"content":{"rendered":"

Back in 2012 LinkedIn suffered a breach wherein 6.5 million passwords were exposed. LinkedIn responded by forcing a password reset on all 6.5 million impacted accounts. This week reports have surfaced about an additional dataset of email and hashed passwords of more than 100 million LinkedIn members (please copy and paste https:\/\/blog.linkedin.com\/2016\/05\/18\/protecting-our-members<\/a>). This additional dataset is believed to be sourced from that same 2012 data breach. As a result, LinkedIn will most likely be responding by again forcing a password reset of a subset of its customer base.<\/p>\n

The top 20 passwords from this dataset (now publicly available) is below:<\/p>\n

Rank \u00a0| \u00a0Password \u00a0| \u00a0Frequency<\/strong><\/p>\n

1 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 123456 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 753,305<\/p>\n

2 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0linkedin \u00a0 \u00a0 \u00a0 \u00a0 \u00a0172,523<\/p>\n

3 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0password \u00a0 \u00a0 \u00a0 144,458<\/p>\n

4 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0123456789 \u00a0 \u00a0 \u00a0 \u00a094,314<\/p>\n

5 \u00a0 \u00a0 \u00a0 \u00a0 \u00a012345678 \u00a0 \u00a0 \u00a0 \u00a0 \u00a063,769<\/p>\n

6 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 111111 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a057,210<\/p>\n

7 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a01234567 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 49,652<\/p>\n

8 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 sunshine \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 39,118<\/p>\n

9 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0qwerty \u00a0 \u00a0 \u00a0 \u00a0\u00a0 \u00a0 \u00a037,538<\/p>\n

10 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0654321 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a033,854<\/p>\n

11 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0000000 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 32,490<\/p>\n

12 \u00a0 \u00a0 \u00a0 password1 \u00a0 \u00a0 \u00a0 \u00a0 30,981<\/p>\n

13 \u00a0 \u00a0 \u00a0 \u00a0 abc123 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 30,398<\/p>\n

14 \u00a0 \u00a0 \u00a0 \u00a0 charlie \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a028,049<\/p>\n

15 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0linked \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 25,334<\/p>\n

16 \u00a0 \u00a0 \u00a0 \u00a0 maggie \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a023,892<\/p>\n

17 \u00a0 \u00a0 \u00a0 \u00a0 michael \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a023,075<\/p>\n

18 \u00a0 \u00a0\u00a0 \u00a0 \u00a0666666 \u00a0 \u00a0 \u00a0 \u00a0\u00a0 \u00a022,888<\/p>\n

19 \u00a0 \u00a0 \u00a0 \u00a0princess \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 22,122<\/p>\n

20 \u00a0 \u00a0 \u00a0 \u00a0123123 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 21,826<\/p>\n

 <\/p>\n

These passwords were stored in a hashed form (encrypted by running through a mathematical function to generate a completely different value) but the bad guys were able to reverse engineer the passwords because these passwords contained commonly used words and numbers.<\/p>\n

Malicious hackers use easily available tools that obtain real passwords by comparing against databases of hashes of known words, also called a dictionary attack.<\/p>\n

This is a good reminder to not use simple and easy to guess passwords. The top 20 password list in the LinkedIn hack above contain simple words that were easily hacked.<\/p>\n

Use a unique password instead of a commonly used word or set of numbers. The more the number of characters and the more irregular the combination of the characters, the more difficult and tougher it is to crack a password.<\/p>\n

So how do you make your password longer without then running the risk of forgetting your password in the first place?<\/p>\n

Information Security recommends the use of\u00a0pass-phrases<\/i>\u00a0which are sentences that are complex and much more difficult to break. A pass-phrase such as \u201cI have a 2012 mustang!\u201d is difficult to break because it has characters such as a space and exclamation mark and it is longer than a regular 8 character password. Remember that not all online sites will support pass-phrases, so use pass-phrases wherever supported.<\/p>\n

If you haven\u2019t changed your LinkedIn password since 2012, it is a good idea to change your password now. We hope the LinkedIn easily guessed password list is an eye opener and a good reason for you to consider to moving from a simpler password to a uniquely longer and safer and easier to remember pass-phrase<\/em>!<\/p>\n","protected":false},"excerpt":{"rendered":"

Are we making it too easy?<\/p>\n","protected":false},"author":1479,"featured_media":239,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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Viegas","chapman_pin_hero_slider":"","footnotes":""},"categories":[1],"tags":[65,66,67,68],"class_list":["post-238","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-dataset","tag-hacker","tag-linkedin","tag-pass-phrase"],"yoast_head":"\nInformation Systems & Technology | Chapman Blogs<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.chapman.edu\/information-systems\/2016\/05\/23\/passphrases-and-the-top-20-commonly-used-passwords-on-linkedin\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Passphrases and the top 20 commonly used passwords on LinkedIn - Information Systems & Technology\" \/>\n<meta property=\"og:description\" content=\"Are we making it too easy?\" \/>\n<meta property=\"og:url\" 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