Password Management Guide: Is Your Password Security Up to Date?

The most commonly used password in Japan in 2025 was "admin." Followed by "123456" and "password." Sound familiar?

The average person now has over 100 online accounts. Remembering a unique, strong password for each one is humanly impossible. Yet reusing passwords across services is one of the most dangerous things you can do online.

This guide covers everything you need to know about password management — from creating strong passwords to choosing a password manager and safely sharing credentials when needed.

Why Password Management Matters

The Danger of Password Reuse

When one service suffers a data breach, attackers take those leaked credentials and try them on every other service — banks, email, shopping sites. This is called credential stuffing, and it works because most people reuse passwords.

• LinkedIn breach → same password used on your email → account takeover
• One leaked password can cascade across your entire digital life

Weak Passwords Are Instantly Crackable

Password	Time to Crack
123456	Instant
password	Instant
admin	Instant
Birthday (8 digits)	Seconds
12+ char mixed	Centuries

How to Create Strong Passwords

Security experts recommend:

1. 12+ characters (16+ is better)
2. Mix uppercase, lowercase, numbers, and symbols
3. Avoid dictionary words
4. Never use personal information (name, birthday, phone number)
5. Unique password for every service

Use Passphrases

A passphrase is easier to remember and harder to crack:

Example: Cherry-2026-Thunder!London — 27 characters, extremely strong

Choosing a Password Manager

A password manager is essential for handling 100+ unique passwords.

Comparison of Major Password Managers

Service	Price	Highlights
1Password	~$3/month	Family sharing, travel mode
Bitwarden	Free–$1/month	Open source, best value
LastPass	Free–$3/month	Strong autofill
Apple Keychain	Free	Seamless Apple ecosystem sync
Google Password Manager	Free	Chrome/Android integration

What to Look For

• Security: Zero-knowledge encryption
• Usability: Autofill and auto-generate features
• Multi-device: Sync across phone, PC, tablet
• Price: Free tier coverage vs. premium features

What NOT to Do

1. Reuse passwords — one per service, always
2. Store in plain text — no Notepad, no Excel
3. Share via messaging apps — iMessage, email, or text can be intercepted
4. Rely solely on browser save — limited security
5. Force periodic changes — modern guidance says don't (unless breached)

When You Need to Share a Password Temporarily

There are legitimate situations where you need to share a password — with a colleague, family member, or contractor. The key is doing it safely.

Never do this:

• Send it via iMessage, email, or Slack
• Write it on a sticky note
• Text it in plain text

Do this instead:

Use LOCK.PUB to create an encrypted, password-protected memo containing the credential. Set an expiration time so access automatically ends. The recipient enters the memo password (which you share verbally or through a different channel) and views the content securely.

No plaintext transmission. No permanent record. Automatic expiration.

Enable Two-Factor Authentication (2FA)

Passwords alone aren't enough. Always enable 2FA on important accounts:

• Authenticator apps (Google Authenticator, Authy) — recommended
• SMS codes — convenient but vulnerable to SIM swap attacks
• Hardware keys (YubiKey) — most secure option

Passkeys: The Future of Authentication

Major services (Google, Apple, Microsoft) now support passkeys — biometric-based authentication that replaces passwords entirely. If a service offers passkeys, enable them. They're phishing-resistant and more convenient than passwords.

Summary

Password management feels tedious until you set it up. Once you have a password manager running:

1. Install a password manager and import existing passwords
2. Gradually update weak and reused passwords
3. Enable 2FA on critical services
4. Use LOCK.PUB for temporary, secure credential sharing

Your digital security starts with this one step. Take it today.

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Share passwords securely with auto-expiring encrypted memos → LOCK.PUB