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Data & Security • PIN & Password Entropy Test

PIN & Password Entropy Security Checker – Crack Time

Evaluates mathematical cryptographic entropy (bits) and estimates offline GPU brute-force cracking resistance for phone lock PINs.

100% Client-Side Privacy Universal Hardware Compatibility Zero Server Data Upload Instant Execution • No Install
100% Client-SideExecution Mode
HTML5 • WebAPICore Engine
Zero Data StoredUser Privacy
Free • No InstallAccess Tier

Password & PIN Entropy Security Checker

Data & Security

Evaluates mathematical cryptographic entropy (bits) and estimates offline GPU brute-force cracking resistance for phone lock PINs.

Strength Rating:Enter PIN
Information Entropy:0 bits
Character Pool Size:—
Est. GPU Crack Time:—
Quick Actions Ready
Lockscreen Security: Standard 4-digit PINs have only 10,000 combinations. An offline dictionary attack on extracted Android FBE (File-Based Encryption) keystore blobs cracks a 4-digit PIN in less than 1 second without hardware throttling.

Frequently Asked Questions

What is password entropy and how is it measured?

Entropy measures password unpredictability in bits (E = L * log2(R)), where L is length and R is character pool size. Higher entropy drastically increases the brute-force time required to crack encryption keys.

How does Android lock screen PIN entropy work?

A 4-digit PIN has only 10,000 combinations (~13.3 bits of entropy), whereas a 6-digit PIN provides 1,000,000 combinations (~19.9 bits). Android Keystore enforces exponential hardware throttling delays to thwart brute-force attacks.

What entropy score is recommended for device encryption?

For full-disk encryption (FDE) and bootloader passwords, an entropy of at least 60 to 80 bits is recommended, combining uppercase, lowercase, numbers, and special symbols.

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