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📋 When to Use Numbers-Only Passwords

Pure digits (0-9) with no letters or symbols. Essential for telephone banking PINs, ATM codes, legacy mainframe systems, and IVR (phone menu) authentication. Many older financial systems only accept numeric input via telephone keypads. For security, use at least 8-12 digits.

📊 تفصيل تقني — numbers-only

• Entropy: 40 bits at 12 digits
• Crack time: Milliseconds (short) / seconds (long)
• Security level: Very Weak
• الأفضل لـ: Phone PINs, legacy codes

All calculations assume numbers-only with mixed character types. Actual security depends on specific character selection.