Fixed DTLS Race Condition & Memory Safety

✅ FIXED HIGH CRITICALITY vulnerabilities (October 2024):
- DTLS ClientHello Race Condition: Added source validation
- Memory Safety Issues: Enhanced secure memory cleanup
- Added DTLS protection constants and validation methods
- Improved memory cleanup with secureWipe and zero-filling
- Integrated DTLS protection in handleSecureAnswer

README.md

@@ -15,7 +15,7 @@
 
 ---
 
-## ✨ What's New in v4.01.413
+## ✨ What's New in v4.01.441
 
 ### 🔒 Comprehensive Connection Security Overhaul
 * **Advanced mutex framework** with 15-second timeout protection
@@ -254,7 +254,7 @@ open http://localhost:8000
 
 ## 🗺️ Development Roadmap
 
-**Current:** v4.01.413 — PWA & File Transfer Edition ✅
+**Current:** v4.01.441 — PWA & File Transfer Edition ✅
 
 * Progressive Web App installation
 * Secure P2P file transfer system
@@ -551,6 +551,6 @@ SecureBit.chat:
 
 ---
 
-**Latest Release: v4.01.413** — PWA & Secure File Transfer
+**Latest Release: v4.01.441** — PWA & Secure File Transfer
 
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