agent-security-manager

name	agent-security-manager
description	Agent skill for security-manager - invoke with $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

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
  () {
     { commitment, challenge, response } = proof;
    
    
     leftSide = ..(.., response);
     rightSide = ..(
      commitment,
      ..(publicKey, challenge)
    );
    
     ..(leftSide, rightSide);
  }

  
   () {
     (value < min || value > max) {
        ();
    }

     bitLength = .(.(max - min + ));
     bits = .(value - min, bitLength);
    
     proofs = [];
     currentCommitment = commitment;
    
    
     ( i = ; i < bitLength; i++) {
       bitProof =  .(bits[i], currentCommitment);
      proofs.(bitProof);
      
      
      currentCommitment = .(currentCommitment, bits[i]);
    }
    
     {
      : proofs,
      : { min, max },
      : bitLength
    };
  }

  
   () {
     n = .(.(range));
     generators = .(n);
    
    
     innerProductProof =  .(
      value, commitment, generators
    );
    
     {
      : ,
      : commitment,
      : innerProductProof,
      : generators,
      : 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
     timingAnomalies = .(messages);
     (timingAnomalies. > ) {
      anomalies.({
        : ,
        : ,
        : timingAnomalies
      });
    }
    
    
     collusionPatterns =  .(participants, messages);
     (collusionPatterns. > ) {
      anomalies.({
        : ,
        : ,
        : collusionPatterns
      });
    }
    
    
     ( participant  participants) {
       ..(
        participant,
        anomalies.( a..(participant))
      );
    }
    
     anomalies;
  }

  
   () {
     identityVerifiers = [
      .(nodeJoinRequest),
      .(nodeJoinRequest),
      .(nodeJoinRequest),
      .(nodeJoinRequest)
    ];
    
     verificationResults =  .(identityVerifiers);
     passedVerifications = verificationResults.( r.);
    
    
     requiredVerifications = ;
     (passedVerifications. < requiredVerifications) {
        ();
    }
    
    
     suspiciousPatterns =  .(nodeJoinRequest);
     (suspiciousPatterns. > ) {
       ..(nodeJoinRequest, suspiciousPatterns);
        ();
    }
    
     ;
  }

  
   () {
     diversityMetrics = .(connectionRequests);
    
    
     (diversityMetrics. < ) {
       .(nodeId, connectionRequests);
    }
    
    
     (diversityMetrics. < ) {
       .(nodeId, connectionRequests);
    }
    
    
     maxConnectionsPerSource = ;
     groupedConnections = .(connectionRequests);
    
     ( [source, connections]  groupedConnections) {
       (connections. > maxConnectionsPerSource) {
         ..(nodeId, source, connections);
        
         allowedConnections = .(
          connections, maxConnectionsPerSource
        );
        .(
          connections.( !allowedConnections.(c))
        );
      }
    }
  }

  
   () {
     rateLimiter =  ();
     requestAnalyzer =  ();
    
    
     anomalousRequests =  requestAnalyzer.(incomingRequests);
    
     (anomalousRequests. > ) {
      
       mitigationStrategies = [
        .(anomalousRequests),
        .(incomingRequests),
        .(anomalousRequests),
        .(anomalousRequests)
      ];
      
       .(mitigationStrategies);
    }
    
     .(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 =  dkgProtocol.(validContributions);
    
    
     keyShares =  dkgProtocol.(masterKey, participants);
    
    
     .(keyShares, participants);
    
     {
      : masterKey.,
      : ceremony,
      : participants
    };
  }

  
   () {
    
     newKey =  .(participants, .(participants. / ) + );
    
    
     transitionPeriod =  *  *  * ; 
     .(currentKeyId, newKey., transitionPeriod);
    
    
     .(participants, newKey);
    
    
    ( () => {
       .(currentKeyId);
    }, transitionPeriod);
    
     newKey;
  }

  
   () {
     backupShares = .(keyShares, backupThreshold);
    
    
     encryptedBackups =  .(
      backupShares.( (share, index) => ({
        : ,
        :  .(share, ),
        : .(share)
      }))
    );
    
    
     .(encryptedBackups);
    
     encryptedBackups.( ({
      : backup.,
      : backup.
    }));
  }

   () {
     backupShares = [];
    
    
     ( i = ; i < backupIds.; i++) {
       encryptedBackup =  .(backupIds[i]);
       decryptedShare =  .(
        encryptedBackup.,
        passwords[i]
      );
      
      
       checksum = .(decryptedShare);
       (checksum !== encryptedBackup.) {
          ();
      }
      
      backupShares.(decryptedShare);
    }
    
    
     .(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
       result =  ..(signedProposal);
      
      
       ..(result);
      
       result;
    }  {
      monitor.();
    }
  }
}

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.(testResults);
  }

   () {
    
     maliciousNodes = .();
     attack =  (maliciousNodes);
    
     startTime = .();
     detectionTime =  ..(attack.());
     endTime = .();
    
     {
      : ,
      : detectionTime !== ,
      : detectionTime ? endTime - startTime : ,
      :  ..(attack)
    };
  }
}

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