What are strong password characteristics?

Related questions

1. Is sha512 faster than sha256?
2. How are passwords hashed?
3. What is Rainbowcrack used for?
4. Is one way hash secure?
5. Should I use sha256 or sha512?
6. How long would it take to crack a 12 character password?
7. How long does it take to break a 16 character password?
8. Is dictionary attack always faster than brute force attack?
9. Is sha512 safe?
10. Is sha384 secure?

Tags

1. #uppercase
2. #letters
3. #secure
4. #characteristics
5. #lowercase
6. #numbers
7. #password
8. #number
9. #sequence
10. #least
11. #different
12. #random
13. #should
14. #include
15. #characters
16. #instance