I found some requirements. It`s simple. All this links was found on first page of google with request "password requirements".
Analysis of requirements to be continued.
Samples:
https://admin.cs.vt.edu/password.html
Password must be atleast 7 characters long and contain atleast one of each of the following:
Uppercase letter
Lowercase letter
Special character or Number.
The characters " (double quote) and ' (single quote) are not allowed in passwords.
Password may not contain in full or partial your username.
You can not use a password that you have used in your past 5 password changes.
http://servicedesk.calpoly.edu/comp...q/password.html
Suggestions for creating an acceptable, secure password:
Don’t use 3 or more alphabetic characters in a row (such as Acfh or rtU)
Don’t use 3 or more numeric characters in a row (such as 391 or 4421)
Choose a password with at least 3 character types
Use special characters in your password
Think of a phrase such as ‘Learn by Doing; for Cal Poly.’ Substitute characters, numbers and special characters for the first letter of each word in the phrase. For example: L-bd;4Cp.
Remember to use a unique password.
Save your password in a secure and private location.
Applicants: You will need this password periodically throughout the application process. Please do not loose your passwords.
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What are the password rules/requirements? Why can’t I use whatever I want for my password?
The rules help you choose a password that can’t easily be guessed by other people or easily “cracked” by automated means.
Password Length
Minimum of 8 characters
Maximum length of 40 characters
What It Must Contain
It must contain at least one character from three of the following lists in the first 8 characters of the password:
Uppercase Alphabetic (A-Z)
Numbers (0-9)
Lower case Alphabetic (a-z)
These Special Characters are allowed:
! “ $ % & , ( ) * + - . / ; : < = > ? [ \ ] ^ _ { | } ~
These are not allowed:
# @ and the space character
What It Cannot Contain
Any words of 3 or more characters, including foreign words
Any groups of 3 or more characters of the same character type
Any names, person, places, or things found in a common dictionary
Any of your names (first, middle, last), any current Cal Poly username
Your previously used password (the system remembers your last password)
Repetitive characters (sequences)
www.lss.ku.edu/docs/Password-Requirements.pdf
A password must meet the following requirements:
• The password must be at least 8 characters long
• The password must contain at least one non-alpha character (a number, period,
space, comma etc)
• The password must contain at least one uppercase and one lowercase letter
http://helpdesk.wisc.edu/page.php?id=4529
SFS Password Requirements
Password must be at least 6 characters in length (maximum is 32).
Password must contain the following :
At least one numeric character (0-9)
At least on special character ! @ # $ % ^ & * ( ) - _ = + \\ |[ ] {} ; : / ? . > <
At least one Uppercase alpha character (A-Z)
At least one Lowercase alpha character (a-z)
Password must be changed every 180 days.
Password can not be reused.
Account will be locked after 5 unsuccessful logon attempts.