agent-security-manager

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.