Password Security Guide: Password Types, MFA Layers and Evergreen Best Practices

1. Password Types and Use Cases

Type	Example Pattern	Notes
Basic password	single word + digits	Easy to guess, not recommended.
Complex password	mixed case + symbols	Can be strong but hard to remember.
Passphrase	long multi-word phrase	Strong due to length and easier recall.
One-time code	TOTP/SMS code	Useful as MFA second factor.

2. Strong Password Logic: Length + Uniqueness

The two most reliable principles are length and unique passwords per account. Reusing one password across services turns one breach into many account takeovers.

Target at least 14-16 characters.
Use a different password for each account.
Avoid personal data patterns and predictable substitutions.

3. Hashing, Salting and Why They Matter

Modern systems should never store plaintext passwords. They store a hash, and add a unique salt so identical passwords produce different stored values. This makes large-scale cracking harder.

4. Multi-Factor Authentication (MFA)

MFA adds a second lock even if a password is leaked.

TOTP app: Strong balance of security and usability.
Hardware key: Excellent for high-risk accounts.
SMS: Better than no MFA, but weaker than app/hardware methods.

5. Common Attack Patterns

Brute force: Automated repeated guessing.
Credential stuffing: Reused leaked credentials across many sites.
Phishing: Fake pages/messages that trick users into revealing credentials.
Keylogging: Capturing keyboard input to steal secrets.

Security tools help, but user awareness remains a critical control.

6. Using a Password Manager

Password managers simplify strong, unique credentials at scale.

Use a long master passphrase.
Enable MFA on the manager account itself.
Store emergency recovery codes safely.

7. Quick Hardening Checklist

Rotate reused passwords → enable MFA → prioritize email/banking/cloud accounts → audit periodically and remove weak credentials.