VaultForge – Enterprise Password Generator

#DecodeLabs Industrial Training intern :- Chittem Gowri Sankar

college :-Viswam Engineering College

What Makes This Different

VaultForge is a professional-grade credential generation system — not just a password generator:

• CSRNG Engine — secrets module (OS entropy), never random.choice()
• Passphrase Mode — Diceware-style memorable passphrases (e.g., Maple-River-Forge-Eagle-7)
• Pattern Detection — Detects keyboard walks (qwerty, asdfgh), repeated chars, single words
• Policy Tester — Test any password against 9 NIST + security rules
• Entropy Analysis — Shannon entropy (E = L × log₂R), crack-time estimate at 10B GPS
• Ambiguous Char Exclusion — Removes 0,O,1,l,I,| for human-readable passwords
• Batch Generation — Generate N passwords at once with inline strength labels
• Analyse Mode — Paste any password, get full security report
• History (Last 50) — JSON-persisted generation log with entropy tracking

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Architecture

┌──────────────────────────────────────────────────────────┐
│                     VaultForge v2.0                      │
├───────────────────┬──────────────────┬───────────────────┤
│  CORE ENGINE      │  ANALYSIS        │  VIEW             │
│  ──────────────── │  ──────────────  │  ──────────────── │
│  build_pool()     │  calculate_      │  print_report()   │
│  generate_        │  entropy()       │  ANSI strength    │
│  password()       │  classify_       │  bars             │
│                   │  strength()      │                   │
│  generate_        │  estimate_crack  │                   │
│  passphrase()     │  _time()         │                   │
│                   │  pattern_check() │                   │
└───────────────────┴──────────────────┴───────────────────┘

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Setup & Run

Pure Python 3.10+ — zero dependencies

python password_generator.py

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Key Python Concepts Used

Concept	Where Used
secrets.choice()	Secure character selection
secrets.SystemRandom().shuffle()	Secure list shuffling
''.join(list)	String construction
math.log2()	Shannon entropy calculation
set() operations	Character pool filtering
Generator expressions	sum(), any(), all() operations
NIST SP 800-63-4	Password policy enforcement

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##Sample Output

╔══════════════════════════════════════════════╗ ║ GENERATED PASSWORD ║ ║ kR8@mP#vQ2!xLzA9^nW ║ ╚══════════════════════════════════════════════╝

Security Analysis (E = L × log₂ R) ────────────────────────────────────────── Length : 20 characters Pool size : 94 symbols Entropy : 131.1 bits Strength : 🟢🟢 Very Strong Bar : [█████████████████████████] Crack time : 4.28e+19 centuries

NIST SP 800-63-4 (min 8) : ✔ PASS High-security (16+) : ✔ PASS

Passphrase: Maple-River-Forge-Eagle-72 Entropy : 76.8 bits → 🟢 Strong

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#Files

project3_password_generator/
├── password_generator.py    ← Main application
├── test_password.py         ← Unit tests
├── password_history.json    ← Auto-created
└── README.md                ← This file