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Step 1: Brute Force Time Calculator
Estimate brute-force time from keyspace size and guesses per second.
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Step 2: PIN Combination Calculator
Calculate exact PIN combinations and entropy from digit count.
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Step 3: Passphrase Entropy Calculator
Estimate passphrase entropy from word count and word-list size.
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Step 4: Backup Code Space Calculator
Calculate exact one-time backup-code search space from code count, length, and alphabet size.