Cryptographic Security Evaluation
18-Character Keyspace Metrics
Recommended Baseline
Shannon Entropy118.3 bits
Offline GPU Crack Time629779.2 trillion years+
Throttled Web Login Crack Time6297791705641.5 trillion years+
Total Permutations (95 chars)95^18 ≈ 4.0 × 10^35
Universal security gold standard. Yields over 118.3 bits of Shannon entropy, rendering exhaustive brute force mathematically impossible even against multi-GPU rigs.
Primary Recommended Use: Everyday banking, email, cloud storage, and social accounts.
Why 18 Characters?
Choosing a 18-character password determines the exact balance between user convenience and brute-force resistance. In an environment where attackers use distributed GPU clusters, every character added multiplies the total security search space by 95.