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Last updated: January 14, 2025

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SECURITY.md
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## 🛡️ Security Overview ## 🛡️ Security Overview
LockBit.chat is built with security-first principles. We take security vulnerabilities seriously and appreciate responsible disclosure from the security community. LockBit.chat is built with security-first principles and implements **military-grade security** with 12-layer protection system. We take security vulnerabilities seriously and appreciate responsible disclosure from the security community.
## 🔒 Security Features **Current Security Status:** 🔒 **MAXIMUM SECURITY (Stage 4)** - Exceeds government-grade communication standards
### Cryptographic Implementation ## 🔒 Enhanced Security Features (Stage 4)
- **Key Exchange:** ECDH P-384 (NIST recommended curve)
- **Encryption:** AES-GCM 256-bit with authenticated encryption
- **Digital Signatures:** ECDSA P-384 for message authenticity
- **Perfect Forward Secrecy:** Automatic key rotation every 5 minutes
- **Non-extractable Keys:** All cryptographic keys are hardware-protected
- **MITM Protection:** Out-of-band verification codes
### Architecture Security ### 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
### 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 - **Zero-trust Model:** No central servers to compromise
- **P2P Direct:** WebRTC encrypted channels - **P2P Direct:** WebRTC encrypted channels with enhanced validation
- **No Data Persistence:** Messages exist only in memory - **No Data Persistence:** Messages exist only in memory, automatic cleanup
- **Rate Limiting:** Protection against spam and DoS - **Enhanced Rate Limiting:** 60 messages/minute, 5 connections/5 minutes with cryptographic verification
- **Replay Protection:** Sequence numbers and message IDs - **Session Security:** 64-byte salts, unique session IDs, and replay attack prevention
- **MITM Protection:** Out-of-band verification codes with enhanced validation
## 🚨 Supported Versions ## 🚨 Supported Versions
| Version | Supported | | Version | Security Level | Supported |
| ------- | ------------------ | | ------- | -------------- | ------------------ |
| 4.0.x | ✅ Yes | | 4.0.x | MAXIMUM | ✅ Yes (12 layers)|
| < 4.0 | ❌ No | | 3.x.x | HIGH | ⚠️ Limited |
| < 3.0 | BASIC | ❌ No |
**Recommendation:** Upgrade to 4.0.x immediately for maximum security protection.
## 📋 Reporting a Vulnerability ## 📋 Reporting a Vulnerability
@@ -74,33 +90,71 @@ We maintain a hall of fame for security researchers who help improve LockBit.cha
### Internal Security Measures ### Internal Security Measures
- **Code Review:** All cryptographic code reviewed by multiple developers - **Code Review:** All cryptographic code reviewed by multiple developers
- **Testing:** Comprehensive security test suite - **Security Testing:** Comprehensive 12-layer security test suite
- **Dependencies:** Regular security updates for all dependencies - **Dependencies:** Regular security updates for all dependencies
- **Vulnerability Testing:** Automated testing for all 12 security layers
## 📊 Security Architecture (Stage 4)
```
12-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)
```
### 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)
## 🛠️ Security Best Practices for Users ## 🛠️ Security Best Practices for Users
### For Maximum Security: ### For Maximum Security:
1. **Verify Authenticity:** Always verify out-of-band codes 1. **Verify Authenticity:** Always verify out-of-band codes (enhanced 6-digit format)
2. **Use Official Source:** Only use https://lockbit.chat 2. **Use Official Source:** Only use https://lockbit.chat
3. **Keep Updated:** Use the latest version 3. **Keep Updated:** Use version 4.0.x for maximum security
4. **Secure Environment:** Use updated browsers on secure devices 4. **Secure Environment:** Use updated browsers on secure devices
5. **Lightning Wallets:** Use reputable Lightning wallets (Alby, Zeus, etc.) 5. **Lightning Wallets:** Use reputable Lightning wallets (Alby, Zeus, etc.)
6. **Monitor Security Status:** Check for "MAXIMUM SECURITY" indicator in chat
### Security Indicators:
- ✅ **Green Shield:** MAXIMUM SECURITY (Stage 4) active
- 🟡 **Yellow Shield:** HIGH SECURITY (Stage 3)
- 🔴 **Red Shield:** Security issues detected
### Red Flags: ### Red Flags:
- ❌ Codes don't match during verification - ❌ Verification codes don't match
- ❌ Security level below Stage 4
- ❌ Unusual connection behavior - ❌ Unusual connection behavior
- ❌ Requests for private keys or seed phrases - ❌ Requests for private keys or seed phrases
- ❌ Unofficial domains or mirrors - ❌ Unofficial domains or mirrors
- ❌ Missing security layer notifications
## 🔬 Security Research Guidelines ## 🔬 Security Research Guidelines
### Scope ### Scope
**In Scope:** **In Scope:**
- ✅ Cryptographic implementation flaws - ✅ Cryptographic implementation flaws in any of the 12 layers
- ✅ WebRTC security issues - ✅ WebRTC security issues
- ✅ Authentication bypass - ✅ Authentication bypass attempts
- ✅ Input validation vulnerabilities - ✅ Input validation vulnerabilities
- ✅ Client-side security issues - ✅ Client-side security issues
- ✅ Traffic analysis vulnerabilities
- ✅ Perfect Forward Secrecy implementation
- ✅ Anti-fingerprinting bypass techniques
- ✅ Fake traffic detection methods
**Out of Scope:** **Out of Scope:**
- ❌ Social engineering attacks - ❌ Social engineering attacks
@@ -108,59 +162,74 @@ We maintain a hall of fame for security researchers who help improve LockBit.cha
- ❌ DoS attacks on user connections - ❌ DoS attacks on user connections
- ❌ Issues requiring physical access - ❌ Issues requiring physical access
- ❌ Lightning Network protocol issues - ❌ Lightning Network protocol issues
- ❌ Browser security vulnerabilities
### Research Ethics ### Research Ethics
- **No Disruption:** Don't interfere with live users - **No Disruption:** Don't interfere with live users
- **Responsible Disclosure:** Follow our disclosure timeline - **Responsible Disclosure:** Follow our disclosure timeline
- **No Data Harvesting:** Don't collect user communications - **No Data Harvesting:** Don't collect user communications
- **Legal Compliance:** Follow all applicable laws - **Legal Compliance:** Follow all applicable laws
- **Respect Privacy:** Don't attempt to break active encrypted sessions
## 📊 Security Metrics ## 🔄 Recent Security Updates (Version 4.0)
We track and publish these security metrics: ### Major Security Enhancements:
- **Response Time:** Average time to acknowledge reports - ✅ **Implemented 12-layer security architecture**
- **Fix Time:** Average time to deploy fixes - ✅ **Added Perfect Forward Secrecy with automatic key rotation**
- **Vulnerability Count:** Number of reported/fixed issues - ✅ **Enhanced MITM protection with ECDSA signatures**
- **Audit Coverage:** Percentage of code under security review - ✅ **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**
## 🔄 Security Updates ### Bug Fixes:
- 🔧 **Fixed fake traffic visibility in user interface**
### How We Notify Users: - 🔧 **Resolved message processing conflicts**
- **Critical:** Immediate notification on website - 🔧 **Improved security layer error handling**
- **Important:** GitHub releases and social media - 🔧 **Enhanced session validation**
- **Minor:** Regular update cycles
### Auto-Update Policy:
- **Critical Security Fixes:** Automatic for web version
- **Feature Updates:** User-controlled
- **Breaking Changes:** Advance notice with migration guide
## 🤝 Working with Security Researchers
We value the security community and offer:
- **Recognition:** Public credit and hall of fame listing
- **Swag:** LockBit.chat merchandise for quality reports
- **References:** LinkedIn recommendations for exceptional work
- **Early Access:** Beta access to new security features
## 📚 Security Resources ## 📚 Security Resources
### Technical Documentation: ### Technical Documentation:
- [Cryptographic Architecture](docs/CRYPTOGRAPHY.md) - [12-Layer Security Architecture](docs/SECURITY-ARCHITECTURE.md)
- [Cryptographic Implementation](docs/CRYPTOGRAPHY.md)
- [P2P Security Model](docs/P2P-SECURITY.md) - [P2P Security Model](docs/P2P-SECURITY.md)
- [Lightning Integration Security](docs/LIGHTNING-SECURITY.md) - [Lightning Integration Security](docs/LIGHTNING-SECURITY.md)
- [Traffic Obfuscation Guide](docs/TRAFFIC-OBFUSCATION.md)
### External Resources: ### External Resources:
- [WebRTC Security Guide](https://webrtc-security.github.io/) - [WebRTC Security Guide](https://webrtc-security.github.io/)
- [Web Crypto API Best Practices](https://www.w3.org/TR/WebCryptoAPI/) - [Web Crypto API Best Practices](https://www.w3.org/TR/WebCryptoAPI/)
- [Lightning Network Security](https://lightning.network/lightning-network-paper.pdf) - [Lightning Network Security](https://lightning.network/lightning-network-paper.pdf)
- [NIST Cryptographic Standards](https://csrc.nist.gov/)
### Security Verification:
```bash
# Verify current security status in browser console:
webrtcManager.getSecurityStatus()
# Expected: { stage: 4, securityLevel: 'MAXIMUM', activeFeatures: 12 }
```
## 📞 Contact Information ## 📞 Contact Information
- **Security Team:** security@lockbit.chat - **Security Team:** security@lockbit.chat
- **General Contact:** lockbitchat@tutanota.com - **General Contact:** lockbitchat@tutanota.com
- **GitHub Issues:** https://github.com/lockbitchat/lockbit-chat/issues - **GitHub Issues:** https://github.com/lockbitchat/lockbit-chat/issues
- **Security Announcements:** [@lockbitchat](https://twitter.com/lockbitchat)
## 🏅 Security Achievements
LockBit.chat v4.0 provides:
- **🥇 Military-Grade Security:** 12-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
**Security Rating: MAXIMUM** - Exceeds most government and military communication standards.
--- ---
*This security policy is reviewed and updated quarterly. Last updated: 08/09/2025* *This security policy is reviewed and updated quarterly. Last updated: January 14, 2025*
*Security implementation verified and tested as of Version 4.0*