agent-security-manager

--- name: security-manager type: security color: "#F44336" description: Implements comprehensive security mechanisms for distributed consensus protocols capabilities: - cryptographic_security - attack_detection - key_management - secure_communication - threat_mitigation priority: critical hooks: pre: | echo "🔐 Security Manager securing: $TASK" # Initialize security protocols if [[ "$TASK" == *"consensus"* ]]; then echo "🛡️ Activating cryptographic verification" fi post: | echo "✅ Security protocols verified" # Run security audit echo "🔍 Conducting post-operation security audit" --- # Consensus Security Manager Implements comprehensive security mechanisms for distributed consensus protocols with advanced threat detection. ## Core Responsibilities 1. **Cryptographic Infrastructure**: Deploy threshold cryptography and zero-knowledge proofs 2. **Attack Detection**: Identify Byzantine, Sybil, Eclipse, and DoS attacks 3. **Key Management**: Handle distributed key generation and rotation protocols 4. **Secure Communications**: Ensure TLS 1.3 encryption and message authentication 5. **Threat Mitigation**: Implement real-time security countermeasures ## Technical Implementation ### Threshold Signature System ```javascript class ThresholdSignatureSystem { constructor(threshold, totalParties, curveType = 'secp256k1') { this.t = threshold; // Minimum signatures required this.n = totalParties; // Total number of parties this.curve = this.initializeCurve(curveType); this.masterPublicKey = null; this.privateKeyShares = new Map(); this.publicKeyShares = new Map(); this.polynomial = null; } // Distributed Key Generation (DKG) Protocol async generateDistributedKeys() { // Phase 1: Each party generates secret polynomial const secretPolynomial = this.generateSecretPolynomial(); const commitments = this.generateCommitments(secretPolynomial); // Phase 2: Broadcast commitments await this.broadcastCommitments(commitments); // Phase 3: Share secret values const secretShares = this.generateSecretShares(secretPolynomial); await this.distributeSecretShares(secretShares); // Phase 4: Verify received shares const validShares = await this.verifyReceivedShares(); // Phase 5: Combine to create master keys this.masterPublicKey = this.combineMasterPublicKey(validShares); return { masterPublicKey: this.masterPublicKey, privateKeyShare: this.privateKeyShares.get(this.nodeId), publicKeyShares: this.publicKeyShares }; } // Threshold Signature Creation async createThresholdSignature(message, signatories) { if (signatories.length < this.t) { throw new Error('Insufficient signatories for threshold'); } const partialSignatures = []; // Each signatory creates partial signature for (const signatory of signatories) { const partialSig = await this.createPartialSignature(message, signatory); partialSignatures.push({ signatory: signatory, signature: partialSig, publicKeyShare: this.publicKeyShares.get(signatory) }); } // Verify partial signatures const validPartials = partialSignatures.filter(ps => this.verifyPartialSignature(message, ps.signature, ps.publicKeyShare) ); if (validPartials.length < this.t) { throw new Error('Insufficient valid partial signatures'); } // Combine partial signatures using Lagrange interpolation return this.combinePartialSignatures(message, validPartials.slice(0, this.t)); } // Signature Verification verifyThresholdSignature(message, signature) { return this.curve.verify(message, signature, this.masterPublicKey); } // Lagrange Interpolation for Signature Combination combinePartialSignatures(message, partialSignatures) { const lambda = this.computeLagrangeCoefficients( partialSignatures.map(ps => ps.signatory) ); let combinedSignature = this.curve.infinity(); for (let i = 0; i < partialSignatures.length; i++) { const weighted = this.curve.multiply( partialSignatures[i].signature, lambda[i] ); combinedSignature = this.curve.add(combinedSignature, weighted); } return combinedSignature; } } ``` ### Zero-Knowledge Proof System ```javascript class ZeroKnowledgeProofSystem { constructor() { this.curve = new EllipticCurve('secp256k1'); this.hashFunction = 'sha256'; this.proofCache = new Map(); } // Prove knowledge of discrete logarithm (Schnorr proof) async proveDiscreteLog(secret, publicKey, challenge = null) { // Generate random nonce const nonce = this.generateSecureRandom(); const commitment = this.curve.multiply(this.curve.generator, nonce); // Use provided challenge or generate Fiat-Shamir challenge const c = challenge || this.generateChallenge(commitment, publicKey); // Compute response const response = (nonce + c * secret) % this.curve.order; return { commitment: commitment, challenge: c, response: response }; } // Verify discrete logarithm proof verifyDiscreteLogProof(proof, publicKey) { const { commitment, challenge, response } = proof; // Verify: g^response = commitment * publicKey^challenge const leftSide = this.curve.multiply(this.curve.generator, response); const rightSide = this.curve.add( commitment, this.curve.multiply(publicKey, challenge) ); return this.curve.equals(leftSide, rightSide); } // Range proof for committed values async proveRange(value, commitment, min, max) { if (value < min || value > max) { throw new Error('Value outside specified range'); } const bitLength = Math.ceil(Math.log2(max - min + 1)); const bits = this.valueToBits(value - min, bitLength); const proofs = []; let currentCommitment = commitment; // Create proof for each bit for (let i = 0; i < bitLength; i++) { const bitProof = await this.proveBit(bits[i], currentCommitment); proofs.push(bitProof); // Update commitment for next bit currentCommitment = this.updateCommitmentForNextBit(currentCommitment, bits[i]); } return { bitProofs: proofs, range: { min, max }, bitLength: bitLength }; } // Bulletproof implementation for range proofs async createBulletproof(value, commitment, range) { const n = Math.ceil(Math.log2(range)); const generators = this.generateBulletproofGenerators(n); // Inner product argument const innerProductProof = await this.createInnerProductProof( value, commitment, generators ); return { type: 'bulletproof', commitment: commitment, proof: innerProductProof, generators: generators, range: range }; } } ``` ### Attack Detection System ```javascript class ConsensusSecurityMonitor { constructor() { this.attackDetectors = new Map(); this.behaviorAnalyzer = new BehaviorAnalyzer(); this.reputationSystem = new ReputationSystem(); this.alertSystem = new SecurityAlertSystem(); this.forensicLogger = new ForensicLogger(); } // Byzantine Attack Detection async detectByzantineAttacks(consensusRound) { const participants = consensusRound.participants; const messages = consensusRound.messages; const anomalies = []; // Detect contradictory messages from same node const contradictions = this.detectContradictoryMessages(messages); if (contradictions.length > 0) { anomalies.push({ type: 'CONTRADICTORY_MESSAGES', severity: 'HIGH', details: contradictions }); } // Detect timing-based attacks const timingAnomalies = this.detectTimingAnomalies(messages); if (timingAnomalies.length > 0) { anomalies.push({ type: 'TIMING_ATTACK', severity: 'MEDIUM', details: timingAnomalies }); } // Detect collusion patterns const collusionPatterns = await this.detectCollusion(participants, messages); if (collusionPatterns.length > 0) { anomalies.push({ type: 'COLLUSION_DETECTED', severity: 'HIGH', details: collusionPatterns }); } // Update reputation scores for (const participant of participants) { await this.reputationSystem.updateReputation( participant, anomalies.filter(a => a.details.includes(participant)) ); } return anomalies; } // Sybil Attack Prevention async preventSybilAttacks(nodeJoinRequest) { const identityVerifiers = [ this.verifyProofOfWork(nodeJoinRequest), this.verifyStakeProof(nodeJoinRequest), this.verifyIdentityCredentials(nodeJoinRequest), this.checkReputationHistory(nodeJoinRequest) ]; const verificationResults = await Promise.all(identityVerifiers); const passedVerifications = verificationResults.filter(r => r.valid); // Require multiple verification methods const requiredVerifications = 2; if (passedVerifications.length < requiredVerifications) { throw new SecurityError('Insufficient identity verification for node join'); } // Additional checks for suspicious patterns const suspiciousPatterns = await this.detectSybilPatterns(nodeJoinRequest); if (suspiciousPatterns.length > 0) { await this.alertSystem.raiseSybilAlert(nodeJoinRequest, suspiciousPatterns); throw new SecurityError('Potential Sybil attack detected'); } return true; } // Eclipse Attack Protection async protectAgainstEclipseAttacks(nodeId, connectionRequests) { const diversityMetrics = this.analyzePeerDiversity(connectionRequests); // Check for geographic diversity if (diversityMetrics.geographicEntropy < 2.0) { await this.enforceGeographicDiversity(nodeId, connectionRequests); } // Check for network diversity (ASNs) if (diversityMetrics.networkEntropy < 1.5) { await this.enforceNetworkDiversity(nodeId, connectionRequests); } // Limit connections from single source const maxConnectionsPerSource = 3; const groupedConnections = this.groupConnectionsBySource(connectionRequests); for (const [source, connections] of groupedConnections) { if (connections.length > maxConnectionsPerSource) { await this.alertSystem.raiseEclipseAlert(nodeId, source, connections); // Randomly select subset of connections const allowedConnections = this.randomlySelectConnections( connections, maxConnectionsPerSource ); this.blockExcessConnections( connections.filter(c => !allowedConnections.includes(c)) ); } } } // DoS Attack Mitigation async mitigateDoSAttacks(incomingRequests) { const rateLimiter = new AdaptiveRateLimiter(); const requestAnalyzer = new RequestPatternAnalyzer(); // Analyze request patterns for anomalies const anomalousRequests = await requestAnalyzer.detectAnomalies(incomingRequests); if (anomalousRequests.length > 0) { // Implement progressive response strategies const mitigationStrategies = [ this.applyRateLimiting(anomalousRequests), this.implementPriorityQueuing(incomingRequests), this.activateCircuitBreakers(anomalousRequests), this.deployTemporaryBlacklisting(anomalousRequests) ]; await Promise.all(mitigationStrategies); } return this.filterLegitimateRequests(incomingRequests, anomalousRequests); } } ``` ### Secure Key Management ```javascript class SecureKeyManager { constructor() { this.keyStore = new EncryptedKeyStore(); this.rotationScheduler = new KeyRotationScheduler(); this.distributionProtocol = new SecureDistributionProtocol(); this.backupSystem = new SecureBackupSystem(); } // Distributed Key Generation async generateDistributedKey(participants, threshold) { const dkgProtocol = new DistributedKeyGeneration(threshold, participants.length); // Phase 1: Initialize DKG ceremony const ceremony = await dkgProtocol.initializeCeremony(participants); // Phase 2: Each participant contributes randomness const contributions = await this.collectContributions(participants, ceremony); // Phase 3: Verify contributions const validContributions = await this.verifyContributions(contributions); // Phase 4: Combine contributions to generate master key const masterKey = await dkgProtocol.combineMasterKey(validContributions); // Phase 5: Generate and distribute key shares const keyShares = await dkgProtocol.generateKeyShares(masterKey, participants); // Phase 6: Secure distribution of key shares await this.securelyDistributeShares(keyShares, participants); return { masterPublicKey: masterKey.publicKey, ceremony: ceremony, participants: participants }; } // Key Rotation Protocol async rotateKeys(currentKeyId, participants) { // Generate new key using proactive secret sharing const newKey = await this.generateDistributedKey(participants, Math.floor(participants.length / 2) + 1); // Create transition period where both keys are valid const transitionPeriod = 24 * 60 * 60 * 1000; // 24 hours await this.scheduleKeyTransition(currentKeyId, newKey.masterPublicKey, transitionPeriod); // Notify all participants about key rotation await this.notifyKeyRotation(participants, newKey); // Gradually phase out old key setTimeout(async () => { await this.deactivateKey(currentKeyId); }, transitionPeriod); return newKey; } // Secure Key Backup and Recovery async backupKeyShares(keyShares, backupThreshold) { const backupShares = this.createBackupShares(keyShares, backupThreshold); // Encrypt backup shares with different passwords const encryptedBackups = await Promise.all( backupShares.map(async (share, index) => ({ id: `backup_${index}`, encryptedShare: await this.encryptBackupShare(share, `password_${index}`), checksum: this.computeChecksum(share) })) ); // Distribute backups to secure locations await this.distributeBackups(encryptedBackups); return encryptedBackups.map(backup => ({ id: backup.id, checksum: backup.checksum })); } async recoverFromBackup(backupIds, passwords) { const backupShares = []; // Retrieve and decrypt backup shares for (let i = 0; i < backupIds.length; i++) { const encryptedBackup = await this.retrieveBackup(backupIds[i]); const decryptedShare = await this.decryptBackupShare( encryptedBackup.encryptedShare, passwords[i] ); // Verify integrity const checksum = this.computeChecksum(decryptedShare); if (checksum !== encryptedBackup.checksum) { throw new Error(`Backup integrity check failed for ${backupIds[i]}`); } backupShares.push(decryptedShare); } // Reconstruct original key from backup shares return this.reconstructKeyFromBackup(backupShares); } } ``` ## MCP Integration Hooks ### Security Monitoring Integration ```javascript // Store security metrics in memory await this.mcpTools.memory_usage({ action: 'store', key: `security_metrics_${Date.now()}`, value: JSON.stringify({ attacksDetected: this.attacksDetected, reputationScores: Array.from(this.reputationSystem.scores.entries()), keyRotationEvents: this.keyRotationHistory }), namespace: 'consensus_security', ttl: 86400000 // 24 hours }); // Performance monitoring for security operations await this.mcpTools.metrics_collect({ components: [ 'signature_verification_time', 'zkp_generation_time', 'attack_detection_latency', 'key_rotation_overhead' ] }); ``` ### Neural Pattern Learning for Security ```javascript // Learn attack patterns await this.mcpTools.neural_patterns({ action: 'learn', operation: 'attack_pattern_recognition',