KeyGuard Vault

Generator Configuration

Password Length 16 chars
Longer passwords dramatically increase time-to-crack complexity.
Character Pools
Characters to pull from when Special Symbols is enabled.
Advanced Generation Rules
Batch Size (Generate Multiple) 1 Password

Generated Secure Password

Entropy: 96 bits Strong Password

Interactive Password Strength Tester

Security Resistance & Cryptanalysis

Security Grade WEAK
Entropy Score 0 Bits
Pool Size 0 Chars
Cracking Resistance (Brute Force Guessing Time)
Online Throttled Attack 100 guesses/sec (e.g. login form) Instant
Offline Fast Hash Attack 100 billion guesses/sec (GPU cluster) Instant
Supercomputer Attack 100 trillion guesses/sec (Massive hardware) Instant
Have I Been Pwned Leak Scan 100% Private

Queries the HIBP database using 5-character prefix hashes to check if this password was previously exposed in standard data breaches.

Not Scanned
Security Enhancement Suggestions
  • Enter password to see recommendations...
Generator Ready · Generator Mode · Secure Client Sandbox

Understanding Password Cryptography, Entropy, & guess metrics

Cryptographic Password Entropy measures the predictability and complexity of a security string. Measured in bits, entropy represents the size of the key search space. A higher entropy value means that the password has a larger number of possible combinations, making brute-force dictionary attacks mathematically unfeasible.

Mathematical Entropy Calculation:

The entropy $E$ of a random password of length $L$ selected from a character pool size $R$ is calculated as:

E = L × log₂ (R)

Where $R$ is the size of the set of characters available (e.g., lowercase only is 26, mixed alphanumeric is 62, mixed with symbols is 94).

Password Leak Auditing & Privacy Sandboxing

Many online credential audits expose your values to servers during checks, creating secondary security hazards. KeyGuard uses the k-Anonymity model to securely check leak status.

How Anonymized Breach Checks work:

  • SHA-1 Hashing: The password is locally hashed to SHA-1 (e.g. 5BAA61E4C9B93F3F0682250B6CF8331B7EE68FD8).
  • 5-Character Range Query: We send only the first 5 characters (5BAA6) to the HIBP server database.
  • Client-Side Verification: The database returns all matching suffixes. The application matches the remaining 35 characters locally. The full password is never exposed to the internet.