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

• Cryptographic Infrastructure: Deploy threshold cryptography and zero-knowledge proofs

• Attack Detection: Identify Byzantine, Sybil, Eclipse, and DoS attacks

• Key Management: Handle distributed key generation and rotation protocols

• Secure Communications: Ensure TLS 1.3 encryption and message authentication

• Threat Mitigation: Implement real-time security countermeasures

Technical Implementation

Threshold Signature System

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

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

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

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

// 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

// Learn attack patterns

await this.mcpTools.neural_patterns({

  action: 'learn',

  operation: 'attack_pattern_recognition',

  outcome: JSON.stringify({

    attackType: detectedAttack.type,

    patterns: detectedAttack.patterns,

    mitigation: appliedMitigation

  })

});

// Predict potential security threats

const threatPrediction = await this.mcpTools.neural_predict({

  modelId: 'security_threat_model',

  input: JSON.stringify(currentSecurityMetrics)

});

Integration with Consensus Protocols

Byzantine Consensus Security

class ByzantineConsensusSecurityWrapper {

  constructor(byzantineCoordinator, securityManager) {

    this.consensus = byzantineCoordinator;

    this.security = securityManager;

  }

  async secureConsensusRound(proposal) {

    // Pre-consensus security checks

    await this.security.validateProposal(proposal);

    // Execute consensus with security monitoring

    const result = await this.executeSecureConsensus(proposal);

    // Post-consensus security analysis

    await this.security.analyzeConsensusRound(result);

    return result;

  }

  async executeSecureConsensus(proposal) {

    // Sign proposal with threshold signature

    const signedProposal = await this.security.thresholdSignature.sign(proposal);

    // Monitor consensus execution for attacks

    const monitor = this.security.startConsensusMonitoring();

    try {

      // Execute Byzantine consensus

      const result = await this.consensus.initiateConsensus(signedProposal);

      // Verify result integrity

      await this.security.verifyConsensusResult(result);

      return result;

    } finally {

      monitor.stop();

    }

  }

}

Security Testing and Validation

Penetration Testing Framework

class ConsensusPenetrationTester {

  constructor(securityManager) {

    this.security = securityManager;

    this.testScenarios = new Map();

    this.vulnerabilityDatabase = new VulnerabilityDatabase();

  }

  async runSecurityTests() {

    const testResults = [];

    // Test 1: Byzantine attack simulation

    testResults.push(await this.testByzantineAttack());

    // Test 2: Sybil attack simulation

    testResults.push(await this.testSybilAttack());

    // Test 3: Eclipse attack simulation

    testResults.push(await this.testEclipseAttack());

    // Test 4: DoS attack simulation

    testResults.push(await this.testDoSAttack());

    // Test 5: Cryptographic security tests

    testResults.push(await this.testCryptographicSecurity());

    return this.generateSecurityReport(testResults);

  }

  async testByzantineAttack() {

    // Simulate malicious nodes sending contradictory messages

    const maliciousNodes = this.createMaliciousNodes(3);

    const attack = new ByzantineAttackSimulator(maliciousNodes);

    const startTime = Date.now();

    const detectionTime = await this.security.detectByzantineAttacks(attack.execute());

    const endTime = Date.now();

    return {

      test: 'Byzantine Attack',

      detected: detectionTime !== null,

      detectionLatency: detectionTime ? endTime - startTime : null,

      mitigation: await this.security.mitigateByzantineAttack(attack)

    };

  }

}

This security manager provides comprehensive protection for distributed consensus protocols with enterprise-grade cryptographic security, advanced threat detection, and robust key management capabilities.