Lessons From the LinkedIn Data Breach

Lessons From the LinkedIn Data BreachReaders of the Bach Seat know that passwords suck and that people are awful at picking passwords. The Business Insider offers more proof. According to a recent article, the 2012 LinkedIn data breach exposed a whopping 167 million accounts that were compromised, including 117 million passwords.

The article says the passwords were hashed or encrypted so they can’t be read, but researchers at LeakedSource have been able to decrypt them. Their findings should be no surprise to Bach Seat followers. The results show just how much the same passwords get used over and over (and over and over and over and over) again.

Most often used passwords

92% of the top leaked LinkedIn passwords were identified as the top 25 most often used passwords in 2011 or 2012. Nearly half of the passwords listed were the most commonly used password in 2011, 2012, or 2013. The top 5 bad passwords were used to “secure” over 1.2 million accounts.

PasswordsThe LeakedSource data says the most popular password for LinkedIn in 2012 was 123456. That password was used by more than 750,000 accounts. Data the Bach Seat has collected says that 123456 has been the top 1 or 2 passwords every year used since 2011.

The remarkably unstealthy password ’linkedin’ is the second most used password on these breached LinkedIn accounts with 172,523 users. That is just so wrong on so many levels.

The password ‘password’ is number three with 144,458 hacked LinkedIn users relying on it to secure their professional profile. Our historical data says that ‘password’ has swapped the top ranking with ‘123456’ since 2011.

password is ‘password’12345678’ is the fourth most popular bad LinkedIn password with 94,214 users according to LeakedSource. This password has been a consistent #3 in my data.

The data for the top 49 passwords is below. You can search for your user name here  Fix your passwords.

RankPasswordFrequencyNotes
1123456753,305#2 in 2012
2linkedin172,523
3password144,458#1 In 2012
412345678994,314#6 in 2012
51234567863,769#3 in 2012
611111157,210#12 in 2011
7123456749,652#7 in 2011
8sunshine39,118#15 in 2011
9qwerty37,538#4 in 2011
1065432133,854#21 in 2011
1100000032,490#25 in 2013
12password130,981#21 in 2013
13abc12330,398#5 in 2011
14charlie28,049
15linked25,334
16maggie23,892
17michael23,075#16 in 2012
1866666622,888
19princess22,122#22 in 2013
2012312321,826#11 in 2013
21iloveyou20,251#9 in 2013
22123456789019,575#13 in 2013
23Linkedin119,441
24daniel19,184
25bailey18,805#17 in 2011
26welcome18,504
27buster18,395
28Passw0rd18,208#18 in 2011
29baseball17,858#9 in 2012
30shadow17,781#17 in 2011
3112121217,134
32hannah17,040
33monkey16,958#6 in 2011
34thomas16,789
35summer16,652
36george16,620
37harley16,275
3822222216,165
39jessica16,088
40GINGER16,040
41michelle16,024
42abcdef15,938
43sophie15,884
44jordan15,839#22 in 2012
45freedom15,793
4655555515,664
47tigger15,658
48joshua15,628
49pepper15,610

rb-

The advice remains the same as I wrote about in 2010.

Strong passwords characteristics:
• At least eight (8) alpha-numeric characters
• At least one numeric character (0-9)
• At least one lower case character (a-z)
• At least one upper case character (A-Z)
• At least one non-alphanumeric character* (~, !, @, #, $, %, ^, &, *, (, ), -, =, +, ?, [, ], {, })
• Are not a word in any language, slang, dialect, jargon, etc.
• Are not based on personal information, names of family, etc.
• Are never written down or stored online.

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Ralph Bach has been in IT long enough to know better and has blogged from his Bach Seat about IT, careers, and anything else that catches his attention since 2005. You can follow him on LinkedInFacebook, and Twitter. Email the Bach Seat here.

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