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📋 When to Use Alphanumeric Passwords

Letters and numbers only — no symbols. Many legacy systems and some banking platforms reject special characters or restrict which symbols are allowed. Rather than guessing which symbols work, use alphanumeric to guarantee compatibility. Still strong at 12+ characters because length beats symbol variety.

📊 รายละเอียดทางเทคนิค — alphanumeric

• Entropy: 96 bits at 16 chars
• Crack time: ~2 trillion years
• Security level: Very Strong
• เหมาะสำหรับ: Legacy systems, no-symbol DBs

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