Skip to content

Security: SecureBitChat/securebit-chat

Security

SECURITY.md

Security Policy

🛡️ Security Overview

SecureBit.chat is built with security-first principles and implements military-grade security with 18-layer protection system. We take security vulnerabilities seriously and appreciate responsible disclosure from the security community.

Current Security Status: 🔒 MAXIMUM SECURITY (Stage 5) - Exceeds government-grade communication standards with complete ASN.1 validation

🔒 Enhanced Security Features (Stage 5)

Multi-Layer Cryptographic Implementation

  • Key Exchange: ECDH P-384 (NIST recommended curve) with non-extractable keys
  • Primary Encryption: AES-GCM 256-bit with authenticated encryption
  • Nested Encryption: Additional AES-GCM 256-bit layer for maximum protection
  • Metadata Protection: Separate AES-GCM 256-bit encryption for message metadata
  • Digital Signatures: ECDSA P-384 with SHA-384 for message authenticity and MITM protection
  • Perfect Forward Secrecy: Automatic key rotation every 5 minutes with secure key versioning
  • Non-extractable Keys: All cryptographic keys are hardware-protected and non-exportable
  • Enhanced Replay Protection: Multi-factor protection with sequence numbers, message IDs, and timestamps
  • Secure Key Storage: WeakMap-based isolation preventing direct access to sensitive keys
  • Key Security Monitoring: Automatic validation, rotation, and emergency wipe capabilities
  • HKDF Key Derivation: RFC 5869 compliant key separation with proper salt and info parameters

Advanced Traffic Obfuscation

  • Packet Padding: Random padding (64-512 bytes) to hide real message sizes
  • Anti-Fingerprinting: Advanced traffic pattern obfuscation and timing randomization
  • Fake Traffic Generation: Invisible decoy messages for traffic analysis protection
  • Message Chunking: Split messages into random-sized chunks with variable delays
  • Packet Reordering Protection: Sequence-based packet reassembly with timeout handling
  • Decoy Channels: Multiple fake communication channels to confuse attackers

Enhanced Security Architecture

  • Zero-trust Model: No central servers to compromise
  • P2P Direct: WebRTC encrypted channels with enhanced validation
  • No Data Persistence: Messages exist only in memory, automatic cleanup
  • Enhanced Rate Limiting: 60 messages/minute, 5 connections/5 minutes with cryptographic verification
  • Session Security: 64-byte salts, unique session IDs, and replay attack prevention
  • MITM Protection: Out-of-band verification codes with enhanced validation
  • Connection Security Framework: Advanced mutex system with 15-second timeout protection
  • Race Condition Protection: Atomic key generation and serialized connection operations
  • Multi-stage Validation: Step-by-step validation with automatic rollback on failures
  • Production Security Logging: Environment-aware logging with data sanitization

🔐 ASN.1 Complete Structure Validation (NEW)

  • Complete ASN.1 DER Parser: Full structural validation of all cryptographic keys
  • OID Validation: Algorithm and curve verification (P-256/P-384 only)
  • EC Point Format Verification: Uncompressed format 0x04 validation
  • SPKI Structure Validation: Element count and type checking
  • Key Size Limits: 50-2000 bytes to prevent DoS attacks
  • BIT STRING Validation: Ensuring unused bits are 0
  • Fallback Support: P-384 to P-256 compatibility
  • High-Risk Vulnerability Fix: Prevents keys with valid headers but modified data

🚨 Supported Versions

Version Security Level Supported
4.02.x MILITARY-GRADE ✅ Yes (18 layers)
4.01.x MILITARY-GRADE ✅ Yes (15 layers)
4.0.x MAXIMUM ✅ Yes (12 layers)
3.x.x HIGH ⚠️ Limited
< 3.0 BASIC ❌ No

Recommendation: Upgrade to 4.02.x immediately for complete ASN.1 validation and military-grade security protection.

📋 Reporting a Vulnerability

🔴 Critical Vulnerabilities

For critical security issues that could compromise user safety:

DO NOT create a public GitHub issue.

Contact us privately:

  • 📧 Email: [email protected] (PGP key below)
  • 🔒 Signal: +[REDACTED] (ask for Signal number via email)
  • 🔐 Keybase: @SecureBitChat

🟡 Non-Critical Issues

For general security improvements or non-critical findings:

  • Create a GitHub issue with [SECURITY] prefix
  • Use our security issue template

📝 Vulnerability Disclosure Process

  1. Report: Send details to [email protected]
  2. Acknowledgment: We'll respond within 24 hours
  3. Investigation: We'll investigate and keep you updated
  4. Fix: We'll develop and test a fix
  5. Disclosure: Public disclosure after fix is deployed
  6. Credit: We'll credit you in our security hall of fame

Timeline Expectations

  • Initial Response: < 24 hours
  • Status Update: Every 72 hours
  • Fix Timeline: Critical bugs < 7 days, Others < 30 days

🏆 Security Hall of Fame

We maintain a hall of fame for security researchers who help improve SecureBit.chat:

Be the first to help secure SecureBit.chat!

🔍 Security Audit History

Independent Audits

  • Pending: Professional cryptographic audit (Q2 2025)
  • Community: Ongoing peer review by security researchers

Internal Security Measures

  • Code Review: All cryptographic code reviewed by multiple developers
  • Security Testing: Comprehensive 18-layer security test suite
  • Dependencies: Regular security updates for all dependencies
  • Vulnerability Testing: Automated testing for all 18 security layers
  • ASN.1 Validation: Complete structural validation of all cryptographic keys

📊 Security Architecture (Stage 5)

19-Layer Security Architecture:
├── Layer 1: Enhanced Authentication (ECDSA P-384 + SHA-384)
├── Layer 2: Key Exchange (ECDH P-384, non-extractable keys)
├── Layer 3: Metadata Protection (AES-256-GCM + 64-byte salt)
├── Layer 4: Message Encryption (Enhanced with sequence numbers)
├── Layer 5: Nested Encryption (Additional AES-256-GCM layer)
├── Layer 6: Packet Padding (64-512 bytes random obfuscation)
├── Layer 7: Anti-Fingerprinting (Advanced pattern obfuscation)
├── Layer 8: Packet Reordering Protection (Sequence + timeout)
├── Layer 9: Message Chunking (Random delays + sizes)
├── Layer 10: Fake Traffic Generation (Invisible decoy messages)
├── Layer 11: Enhanced Rate Limiting (Cryptographic verification)
├── Layer 12: Perfect Forward Secrecy (5-minute key rotation)
├── Layer 13: Mutex Framework (Race condition protection)
├── Layer 14: Secure Key Storage (WeakMap isolation)
├── Layer 15: Production Logging (Data sanitization)
├── Layer 16: ASN.1 Validation (Complete key structure verification)
├── Layer 17: OID Validation (Algorithm and curve verification)
├── Layer 18: EC Point Validation (Format and structure verification)
└── Layer 19: HKDF Key Derivation (RFC 5869 compliant key separation)

Security Metrics

  • Encryption Strength: Triple-layer AES-256-GCM
  • Key Security: P-384 ECDH/ECDSA (equivalent to 7680-bit RSA)
  • Forward Secrecy: Complete (automatic key rotation)
  • Traffic Analysis Protection: Maximum (6-layer obfuscation)
  • Attack Surface: Minimal (P2P, no central servers)
  • Key Validation: Complete ASN.1 DER parsing and validation
  • Structural Security: Full PKCS compliance for all operations

🛠️ Security Best Practices for Users

For Maximum Security:

  1. Verify Authenticity: Always verify out-of-band codes (enhanced 6-digit format)
  2. Use Official Source: Only use https://SecureBit.chat
  3. Keep Updated: Use version 4.02.x for complete ASN.1 validation
  4. Secure Environment: Use updated browsers on secure devices
  5. Monitor Security Status: Check for "MAXIMUM SECURITY" indicator in chat

Security Indicators:

  • ✅ Green Shield: MAXIMUM SECURITY (Stage 5) active
  • 🟡 Yellow Shield: HIGH SECURITY (Stage 3-4)
  • 🔴 Red Shield: Security issues detected

Red Flags:

  • ❌ Verification codes don't match
  • ❌ Security level below Stage 5
  • ❌ Unusual connection behavior
  • ❌ Requests for private keys or seed phrases
  • ❌ Unofficial domains or mirrors
  • ❌ Missing security layer notifications

Research Ethics

  • No Disruption: Don't interfere with live users
  • Responsible Disclosure: Follow our disclosure timeline
  • No Data Harvesting: Don't collect user communications
  • Legal Compliance: Follow all applicable laws
  • Respect Privacy: Don't attempt to break active encrypted sessions

🔬 Security Research Guidelines

Scope

In Scope:

  • ✅ Cryptographic implementation flaws in any of the 18 layers
  • ✅ WebRTC security issues
  • ✅ Authentication bypass attempts
  • ✅ Input validation vulnerabilities
  • ✅ Client-side security issues
  • ✅ Traffic analysis vulnerabilities
  • ✅ Perfect Forward Secrecy implementation
  • ✅ Anti-fingerprinting bypass techniques
  • ✅ Fake traffic detection methods
  • ✅ ASN.1 validation bypass attempts
  • ✅ Key structure manipulation attacks
  • ✅ OID validation bypass techniques

Out of Scope:

  • ❌ Social engineering attacks
  • ❌ Physical attacks on user devices
  • ❌ DoS attacks on user connections
  • ❌ Issues requiring physical access
  • ❌ Browser security vulnerabilities

🔄 Recent Security Updates (Version 4.02)

Major Security Enhancements:

  • ✅ Implemented 19-layer security architecture
  • ✅ Added complete ASN.1 DER parser for key validation
  • ✅ Enhanced key security with OID and EC point verification
  • ✅ Fixed high-risk vulnerability in key structure validation
  • ✅ Added SPKI structure validation and element checking
  • ✅ Implemented key size limits to prevent DoS attacks
  • ✅ Added BIT STRING validation ensuring unused bits are 0
  • ✅ Enhanced fallback support from P-384 to P-256
  • ✅ Implemented RFC 5869 compliant HKDF key derivation
  • ✅ Enhanced key separation with proper salt and info parameters

Previous Enhancements (Version 4.01):

  • ✅ Implemented 15-layer security architecture
  • ✅ Added Perfect Forward Secrecy with automatic key rotation
  • ✅ Enhanced MITM protection with ECDSA signatures
  • ✅ Implemented traffic obfuscation (fake traffic, padding, chunking)
  • ✅ Added anti-fingerprinting protection
  • ✅ Fixed demo session creation vulnerability
  • ✅ Eliminated session replay attacks
  • ✅ Enhanced rate limiting with cryptographic verification

Bug Fixes:

  • 🔧 Fixed fake traffic visibility in user interface
  • 🔧 Resolved message processing conflicts
  • 🔧 Improved security layer error handling
  • 🔧 Enhanced session validation
  • 🔧 Complete rewrite of validateKeyStructure() method

📚 Security Resources

Technical Documentation:

External Resources:

Security Verification:

# Verify current security status in browser console:
webrtcManager.getSecurityStatus()
# Expected: { stage: 5, securityLevel: 'MAXIMUM', activeFeatures: 18 }

# Verify ASN.1 validation status:
cryptoManager.getASN1ValidationStatus()
# Expected: { enabled: true, parser: 'DER', validation: 'complete' }

📞 Contact Information

🏅 Security Achievements

SecureBit.chat v4.02 provides:

  • 🥇 Military-Grade Security: 19-layer protection system
  • 🥇 Government-Level Encryption: Triple AES-256-GCM + P-384 ECDH/ECDSA
  • 🥇 Perfect Forward Secrecy: Complete with automatic key rotation
  • 🥇 Traffic Analysis Protection: Maximum with 6-layer obfuscation
  • 🥇 Zero-Trust Architecture: No central points of failure
  • 🥇 Complete ASN.1 Validation: Full structural verification of all cryptographic keys
  • 🥇 PKCS Compliance: Complete adherence to cryptographic standards
  • 🥇 HKDF Key Derivation: RFC 5869 compliant key separation and derivation

Security Rating: MAXIMUM - Exceeds most government and military communication standards with complete key structure validation.

This security policy is reviewed and updated quarterly. Last updated: January 15, 2025 Security implementation verified and tested as of Version 4.02.442

There aren’t any published security advisories