Tạo PIN

📋 When to Use PIN Codes

PINs are numeric-only codes ideal for: ATM/banking PINs, phone unlock codes, door access codes, and parental controls. Default 4 digits — the standard for most financial systems. Never use easily guessable PINs like 1234, 0000, or your birth year. For security-critical PINs, consider 6 digits instead of 4.

📊 Phan Tich Ky Thuat — pin

• Entropy: 4-digit: 10K combos, 6-digit: 1M combos
• Crack time: Milliseconds without rate-limit
• Security level: Rate-limit dependent
• Tot Nhat Cho: ATM, phone lock, door code

All calculations assume pin with mixed character types. Actual security depends on specific character selection.