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A password entropy calculator measures the cryptographic strength of a password in bits: entropy = log₂(character set size^password length). A 12-character password using upper, lower, digits, and symbols has ~79 bits of entropy. At least 60–70 bits is generally recommended; password managers make using high-entropy passwords practical.

Hướng dẫn từng bước

1. 1Count character set size
2. 2Calculate combinations for length
3. 3Show bits of entropy

Ví dụ có lời giải

Lỗi thường gặp cần tránh

• ✕Not double-checking results
• ✕Ignoring edge cases

Câu hỏi thường gặp