A password is a secret word or string of characters used to authenticate a user's identity and allow access to a protected resource. Passwords have been used for centuries, with sentries challenging those seeking entry to supply a password. Common passwords today are used to access operating systems, phones, TVs, ATMs and more. A 2016 study found the most commonly used but least secure passwords were "123456", "password", and variations using numbers. Strong passwords contain a mix of uppercase and lowercase letters, numbers, and symbols, and are at least 15 characters long. Methods for creating strong, memorable passwords include deriving them from personal facts, patterns, or prime numbers.

1. Password
Strong & memorable passwords

2. What is password?
A password is a word or string of characters used
for user authentication to prove identity or access
approval to gain access to a resource (example: an
access code is a type of password), which is to be
kept secret from those not allowed access.

3. History
Passwords or watchwords have been used since ancient times. Sentries would
challenge those wishing to enter an area or approaching it to supply a password or
watchword, and would only allow a person or group to pass if they knew the password.
In modern times, user names and passwords are commonly used by people during a
log in process that controls access to protected computer operating systems, mobile
phones, cable TV decoders, automated teller machines (ATMs), etc

4. Top 20 unsecured common passwords of 2016
1 123456
2 password
3 12345
4 12345678
5 qwerty
6 123456789
7 1234
8 baseball
9 dragon
10 football
11 1234567
12 monkey
13 letmein
14 abc123
15 111111
16 mustang
17 access
18 shadow
19 master
20 michael

5. Strong passwords
A strong password has:
● at least 15 characters
● uppercase letters
● lowercase letters
● Numbers
● symbols, such as ` ! " ? $ ? % ^ & * ( ) _ - + = { [ } ] : ; @ ' ~ # | < , > . ? /
Example from https://strongpasswordgenerator.com/ #6"981ETsU2px9C

6. How to remember the password
● You to have to have sharp memory
● Memory techniques
● Some pattern you have to find out
Or use insecure passwords
***** Test your password weakness from: https://howsecureismypassword.net/
According to this site earlier password is crackable in 429 BILLION YEARS for a
computer.

7. My way to make password
● Use a row from multiplication table like: 300Times2=600 (3MYrs) if you want to
more secure this then you may use 300Times2=SixHundreds (3 SEXTILLION
YEARS)
● You may use your birthday like: 1990.3.19isMyBirtday(117 QUINTILLION
YEARS)
● Maybe Prime Numbers like: 1235711ArePrimeNumbers(2 SEXTILLION YEARS)
Or you can invent your new way to make passwords like this.

8. References
https://en.wikipedia.org/wiki/Password
http://bgr.com/2016/01/19/worst-passwords-2016-list/
https://strongpasswordgenerator.com/