Third Party Incident Management (also “Vendor Incident Response” or “Supplier Incident Management”) is the process of response and management of security incidents involving suppliers, business partners, and other third parties in the supply chain. This process is fundamental in third-party risk management (TPRM) and requires coordination between the organization and its suppliers to contain, investigate, and remediate incidents that can affect multiple parties, being essential for protecting shared assets, maintaining business continuity, and meeting regulatory and contractual requirements related to information security.

What is Third Party Incident Management?

Third party incident management is a specialized process that addresses security breaches occurring in the supply chain, requiring coordination between multiple organizations and extended risk management.

Process Components

Detection and Notification

  • Early Detection: Rapid incident identification
  • Immediate Notification: Immediate communication with third parties
  • Impact Assessment: Analysis of impact on the organization
  • Team Activation: Activation of response teams

Coordination and Response

  • Inter-organizational Coordination: Coordination between multiple organizations
  • Communication Management: Communication with stakeholders
  • Collaborative Containment: Coordinated incident containment
  • Joint Recovery: Coordinated service recovery

Follow-up and Improvement

  • Continuous Monitoring: Monitoring of incident status
  • Post-Incident Analysis: Joint incident analysis
  • Process Improvement: Improvement of response processes
  • Contract Updates: Agreement updates

Incident Management System

Incident Management

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import pandas as pd
import numpy as np
from datetime import datetime, timedelta
import json

class ThirdPartyIncidentManagement:
    def __init__(self):
        self.incidents = {}
        self.third_parties = {}
        self.response_teams = {}
        self.communication_channels = {}
        self.escalation_rules = {}
        self.lessons_learned = {}
    
    def register_third_party(self, party_id, party_data):
        """Register third party"""
        self.third_parties[party_id] = {
            'party_id': party_id,
            'name': party_data['name'],
            'type': party_data['type'],
            'criticality': party_data.get('criticality', 'medium'),
            'contact_info': party_data.get('contact_info', {}),
            'incident_contact': party_data.get('incident_contact', {}),
            'escalation_contacts': party_data.get('escalation_contacts', []),
            'sla_requirements': party_data.get('sla_requirements', {}),
            'data_shared': party_data.get('data_shared', []),
            'systems_accessed': party_data.get('systems_accessed', []),
            'last_incident': None,
            'incident_count': 0
        }
    
    def create_incident(self, incident_id, incident_data):
        """Create third party incident"""
        incident = {
            'incident_id': incident_id,
            'title': incident_data['title'],
            'description': incident_data['description'],
            'severity': incident_data['severity'],
            'category': incident_data['category'],
            'affected_third_parties': incident_data.get('affected_third_parties', []),
            'discovered_by': incident_data.get('discovered_by', 'unknown'),
            'discovery_date': incident_data.get('discovery_date', datetime.now()),
            'status': 'open',
            'priority': self.calculate_priority(incident_data),
            'impact_assessment': {},
            'response_actions': [],
            'communications': [],
            'timeline': [],
            'lessons_learned': [],
            'created_date': datetime.now()
        }
        
        self.incidents[incident_id] = incident
        
        # Update incident counter for affected third parties
        for party_id in incident['affected_third_parties']:
            if party_id in self.third_parties:
                self.third_parties[party_id]['incident_count'] += 1
                self.third_parties[party_id]['last_incident'] = incident['discovery_date']
        
        return incident
    
    def calculate_priority(self, incident_data):
        """Calculate incident priority"""
        severity = incident_data['severity']
        affected_parties = len(incident_data.get('affected_third_parties', []))
        
        # Calculate priority based on severity and number of affected third parties
        priority_scores = {
            'critical': 4,
            'high': 3,
            'medium': 2,
            'low': 1
        }
        
        base_priority = priority_scores.get(severity, 2)
        
        # Adjust by number of affected third parties
        if affected_parties > 5:
            base_priority += 1
        elif affected_parties > 2:
            base_priority += 0.5
        
        # Determine final priority
        if base_priority >= 4:
            return 'critical'
        elif base_priority >= 3:
            return 'high'
        elif base_priority >= 2:
            return 'medium'
        else:
            return 'low'
    
    def assess_impact(self, incident_id, impact_data):
        """Assess incident impact"""
        if incident_id not in self.incidents:
            return False
        
        incident = self.incidents[incident_id]
        
        impact_assessment = {
            'business_impact': impact_data.get('business_impact', 'unknown'),
            'financial_impact': impact_data.get('financial_impact', 0),
            'reputation_impact': impact_data.get('reputation_impact', 'unknown'),
            'regulatory_impact': impact_data.get('regulatory_impact', 'unknown'),
            'data_compromised': impact_data.get('data_compromised', []),
            'systems_affected': impact_data.get('systems_affected', []),
            'customers_affected': impact_data.get('customers_affected', 0),
            'estimated_downtime': impact_data.get('estimated_downtime', 0),
            'recovery_time': impact_data.get('recovery_time', 0),
            'assessed_by': impact_data.get('assessed_by', 'unknown'),
            'assessment_date': datetime.now()
        }
        
        incident['impact_assessment'] = impact_assessment
        
        # Update priority based on impact
        incident['priority'] = self.update_priority_based_on_impact(incident)
        
        return True
    
    def update_priority_based_on_impact(self, incident):
        """Update priority based on impact"""
        impact = incident['impact_assessment']
        
        # Check high impact factors
        high_impact_factors = 0
        
        if impact['business_impact'] == 'critical':
            high_impact_factors += 2
        elif impact['business_impact'] == 'high':
            high_impact_factors += 1
        
        if impact['financial_impact'] > 1000000:  # > $1M
            high_impact_factors += 2
        elif impact['financial_impact'] > 100000:  # > $100K
            high_impact_factors += 1
        
        if impact['reputation_impact'] == 'severe':
            high_impact_factors += 2
        elif impact['reputation_impact'] == 'moderate':
            high_impact_factors += 1
        
        if impact['regulatory_impact'] == 'severe':
            high_impact_factors += 2
        elif impact['regulatory_impact'] == 'moderate':
            high_impact_factors += 1
        
        if impact['customers_affected'] > 10000:
            high_impact_factors += 2
        elif impact['customers_affected'] > 1000:
            high_impact_factors += 1
        
        # Determine updated priority
        if high_impact_factors >= 6:
            return 'critical'
        elif high_impact_factors >= 4:
            return 'high'
        elif high_impact_factors >= 2:
            return 'medium'
        else:
            return 'low'
    
    def add_response_action(self, incident_id, action_data):
        """Add response action"""
        if incident_id not in self.incidents:
            return False
        
        action_id = f"ACTION-{len(self.incidents[incident_id]['response_actions']) + 1}"
        
        action = {
            'action_id': action_id,
            'description': action_data['description'],
            'assigned_to': action_data['assigned_to'],
            'third_party': action_data.get('third_party'),
            'action_type': action_data.get('action_type', 'general'),
            'priority': action_data.get('priority', 'medium'),
            'due_date': action_data.get('due_date'),
            'status': 'pending',
            'created_date': datetime.now(),
            'completed_date': None,
            'notes': action_data.get('notes', '')
        }
        
        self.incidents[incident_id]['response_actions'].append(action)
        
        # Add to timeline
        self.incidents[incident_id]['timeline'].append({
            'timestamp': datetime.now(),
            'event': f"Response action added: {action['description']}",
            'actor': action_data.get('created_by', 'system')
        })
        
        return True
    
    def update_action_status(self, incident_id, action_id, status, notes=None):
        """Update action status"""
        if incident_id not in self.incidents:
            return False
        
        incident = self.incidents[incident_id]
        
        for action in incident['response_actions']:
            if action['action_id'] == action_id:
                action['status'] = status
                if notes:
                    action['notes'] = notes
                
                if status == 'completed':
                    action['completed_date'] = datetime.now()
                
                # Add to timeline
                incident['timeline'].append({
                    'timestamp': datetime.now(),
                    'event': f"Action {action_id} updated to {status}",
                    'actor': 'system'
                })
                
                return True
        
        return False
    
    def add_communication(self, incident_id, communication_data):
        """Add communication"""
        if incident_id not in self.incidents:
            return False
        
        communication_id = f"COMM-{len(self.incidents[incident_id]['communications']) + 1}"
        
        communication = {
            'communication_id': communication_id,
            'type': communication_data['type'],
            'direction': communication_data['direction'],  # 'inbound' or 'outbound'
            'third_party': communication_data.get('third_party'),
            'subject': communication_data['subject'],
            'content': communication_data['content'],
            'sent_by': communication_data['sent_by'],
            'sent_to': communication_data['sent_to'],
            'timestamp': datetime.now(),
            'priority': communication_data.get('priority', 'normal'),
            'status': 'sent'
        }
        
        self.incidents[incident_id]['communications'].append(communication)
        
        # Add to timeline
        self.incidents[incident_id]['timeline'].append({
            'timestamp': datetime.now(),
            'event': f"Communication {communication['type']} sent to {communication['sent_to']}",
            'actor': communication['sent_by']
        })
        
        return True
    
    def escalate_incident(self, incident_id, escalation_data):
        """Escalate incident"""
        if incident_id not in self.incidents:
            return False
        
        incident = self.incidents[incident_id]
        
        escalation = {
            'escalation_id': f"ESC-{len(incident.get('escalations', [])) + 1}",
            'reason': escalation_data['reason'],
            'escalated_to': escalation_data['escalated_to'],
            'escalated_by': escalation_data['escalated_by'],
            'timestamp': datetime.now(),
            'priority': escalation_data.get('priority', 'high'),
            'status': 'active'
        }
        
        if 'escalations' not in incident:
            incident['escalations'] = []
        
        incident['escalations'].append(escalation)
        
        # Update incident priority
        if escalation['priority'] == 'critical':
            incident['priority'] = 'critical'
        
        # Add to timeline
        incident['timeline'].append({
            'timestamp': datetime.now(),
            'event': f"Incident escalated to {escalation['escalated_to']}",
            'actor': escalation['escalated_by']
        })
        
        return True
    
    def close_incident(self, incident_id, closure_data):
        """Close incident"""
        if incident_id not in self.incidents:
            return False
        
        incident = self.incidents[incident_id]
        
        # Verify all actions are completed
        pending_actions = [a for a in incident['response_actions'] if a['status'] == 'pending']
        if pending_actions:
            return False  # Cannot close with pending actions
        
        incident['status'] = 'closed'
        incident['closure_date'] = datetime.now()
        incident['closure_reason'] = closure_data.get('reason', 'resolved')
        incident['closure_notes'] = closure_data.get('notes', '')
        incident['closed_by'] = closure_data.get('closed_by', 'unknown')
        
        # Add to timeline
        incident['timeline'].append({
            'timestamp': datetime.now(),
            'event': f"Incident closed: {incident['closure_reason']}",
            'actor': incident['closed_by']
        })
        
        return True
    
    def generate_incident_report(self, incident_id):
        """Generate incident report"""
        if incident_id not in self.incidents:
            return None
        
        incident = self.incidents[incident_id]
        
        # Calculate metrics
        total_actions = len(incident['response_actions'])
        completed_actions = len([a for a in incident['response_actions'] if a['status'] == 'completed'])
        pending_actions = len([a for a in incident['response_actions'] if a['status'] == 'pending'])
        
        total_communications = len(incident['communications'])
        escalations = len(incident.get('escalations', []))
        
        # Calculate duration
        if incident['status'] == 'closed':
            duration = incident['closure_date'] - incident['discovery_date']
        else:
            duration = datetime.now() - incident['discovery_date']
        
        report = {
            'incident_id': incident_id,
            'title': incident['title'],
            'status': incident['status'],
            'priority': incident['priority'],
            'severity': incident['severity'],
            'discovery_date': incident['discovery_date'],
            'closure_date': incident.get('closure_date'),
            'duration': duration,
            'affected_third_parties': incident['affected_third_parties'],
            'impact_assessment': incident['impact_assessment'],
            'response_metrics': {
                'total_actions': total_actions,
                'completed_actions': completed_actions,
                'pending_actions': pending_actions,
                'completion_rate': (completed_actions / total_actions * 100) if total_actions > 0 else 0
            },
            'communication_metrics': {
                'total_communications': total_communications,
                'escalations': escalations
            },
            'timeline': incident['timeline'],
            'lessons_learned': incident.get('lessons_learned', []),
            'recommendations': self.generate_incident_recommendations(incident)
        }
        
        return report
    
    def generate_incident_recommendations(self, incident):
        """Generate recommendations based on incident"""
        recommendations = []
        
        # Recommendations based on duration
        if incident['status'] == 'closed':
            duration = incident['closure_date'] - incident['discovery_date']
            if duration.days > 7:
                recommendations.append({
                    'type': 'response_time',
                    'priority': 'high',
                    'description': "Improve response time - incident lasted more than 7 days"
                })
        
        # Recommendations based on escalations
        escalations = incident.get('escalations', [])
        if len(escalations) > 2:
            recommendations.append({
                'type': 'escalation_management',
                'priority': 'medium',
                'description': f"Review escalation process - {len(escalations)} escalations"
            })
        
        # Recommendations based on pending actions
        pending_actions = [a for a in incident['response_actions'] if a['status'] == 'pending']
        if len(pending_actions) > 0:
            recommendations.append({
                'type': 'action_management',
                'priority': 'high',
                'description': f"Complete {len(pending_actions)} pending actions"
            })
        
        # Recommendations based on affected third parties
        if len(incident['affected_third_parties']) > 3:
            recommendations.append({
                'type': 'third_party_management',
                'priority': 'medium',
                'description': "Review third party management - multiple affected"
            })
        
        return recommendations

# Usage example
incident_mgmt = ThirdPartyIncidentManagement()

# Register third party
incident_mgmt.register_third_party('TP-001', {
    'name': 'Cloud Provider',
    'type': 'cloud_provider',
    'criticality': 'high',
    'contact_info': {'email': 'security@cloudprovider.com'},
    'incident_contact': {'email': 'incidents@cloudprovider.com'},
    'data_shared': ['customer_data', 'financial_data'],
    'systems_accessed': ['production_db', 'backup_systems']
})

# Create incident
incident = incident_mgmt.create_incident('INC-001', {
    'title': 'Data Breach at Cloud Provider',
    'description': 'Suspected data breach affecting customer data',
    'severity': 'high',
    'category': 'data_breach',
    'affected_third_parties': ['TP-001'],
    'discovered_by': 'Security Team'
})

# Assess impact
incident_mgmt.assess_impact('INC-001', {
    'business_impact': 'high',
    'financial_impact': 500000,
    'reputation_impact': 'moderate',
    'regulatory_impact': 'moderate',
    'data_compromised': ['customer_data'],
    'customers_affected': 5000
})

# Add response action
incident_mgmt.add_response_action('INC-001', {
    'description': 'Contact cloud provider for incident details',
    'assigned_to': 'Security Team',
    'third_party': 'TP-001',
    'action_type': 'communication',
    'priority': 'high'
})

# Generate report
report = incident_mgmt.generate_incident_report('INC-001')
print(f"Incident report: {report['title']}")
print(f"Priority: {report['priority']}")
print(f"Affected third parties: {len(report['affected_third_parties'])}")

Inter-organizational Coordination

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class InterOrganizationalCoordination:
    def __init__(self):
        self.coordination_channels = {}
        self.shared_playbooks = {}
        self.escalation_matrices = {}
        self.communication_protocols = {}
    
    def setup_coordination_channel(self, channel_id, channel_config):
        """Setup coordination channel"""
        self.coordination_channels[channel_id] = {
            'channel_id': channel_id,
            'name': channel_config['name'],
            'type': channel_config['type'],
            'participants': channel_config['participants'],
            'purpose': channel_config['purpose'],
            'communication_methods': channel_config['communication_methods'],
            'escalation_rules': channel_config.get('escalation_rules', []),
            'active': True
        }
    
    def create_shared_playbook(self, playbook_id, playbook_config):
        """Create shared playbook"""
        self.shared_playbooks[playbook_id] = {
            'playbook_id': playbook_id,
            'name': playbook_config['name'],
            'incident_type': playbook_config['incident_type'],
            'participating_organizations': playbook_config['participating_organizations'],
            'roles_responsibilities': playbook_config['roles_responsibilities'],
            'communication_protocols': playbook_config['communication_protocols'],
            'escalation_procedures': playbook_config['escalation_procedures'],
            'response_actions': playbook_config['response_actions'],
            'created_date': datetime.now(),
            'last_updated': datetime.now()
        }
    
    def activate_playbook(self, playbook_id, incident_id, activation_data):
        """Activate shared playbook"""
        if playbook_id not in self.shared_playbooks:
            return False
        
        playbook = self.shared_playbooks[playbook_id]
        
        activation = {
            'activation_id': f"ACT-{len(playbook.get('activations', [])) + 1}",
            'incident_id': incident_id,
            'playbook_id': playbook_id,
            'activated_by': activation_data['activated_by'],
            'activation_date': datetime.now(),
            'participating_organizations': playbook['participating_organizations'],
            'status': 'active',
            'coordination_channel': activation_data.get('coordination_channel'),
            'escalation_contacts': activation_data.get('escalation_contacts', [])
        }
        
        if 'activations' not in playbook:
            playbook['activations'] = []
        
        playbook['activations'].append(activation)
        
        return True
    
    def coordinate_response_action(self, activation_id, action_data):
        """Coordinate response action"""
        # Find activation
        activation = None
        for playbook in self.shared_playbooks.values():
            for act in playbook.get('activations', []):
                if act['activation_id'] == activation_id:
                    activation = act
                    break
        
        if not activation:
            return False
        
        coordination_action = {
            'action_id': f"COORD-{len(activation.get('coordinated_actions', [])) + 1}",
            'description': action_data['description'],
            'responsible_organization': action_data['responsible_organization'],
            'supporting_organizations': action_data.get('supporting_organizations', []),
            'priority': action_data.get('priority', 'medium'),
            'due_date': action_data.get('due_date'),
            'status': 'pending',
            'created_date': datetime.now(),
            'coordination_notes': action_data.get('coordination_notes', '')
        }
        
        if 'coordinated_actions' not in activation:
            activation['coordinated_actions'] = []
        
        activation['coordinated_actions'].append(coordination_action)
        
        return True
    
    def escalate_coordination(self, activation_id, escalation_data):
        """Escalate coordination"""
        # Find activation
        activation = None
        for playbook in self.shared_playbooks.values():
            for act in playbook.get('activations', []):
                if act['activation_id'] == activation_id:
                    activation = act
                    break
        
        if not activation:
            return False
        
        escalation = {
            'escalation_id': f"ESC-{len(activation.get('escalations', [])) + 1}",
            'reason': escalation_data['reason'],
            'escalated_to': escalation_data['escalated_to'],
            'escalated_by': escalation_data['escalated_by'],
            'timestamp': datetime.now(),
            'priority': escalation_data.get('priority', 'high'),
            'status': 'active'
        }
        
        if 'escalations' not in activation:
            activation['escalations'] = []
        
        activation['escalations'].append(escalation)
        
        return True
    
    def generate_coordination_report(self, activation_id):
        """Generate coordination report"""
        # Find activation
        activation = None
        playbook = None
        for pb in self.shared_playbooks.values():
            for act in pb.get('activations', []):
                if act['activation_id'] == activation_id:
                    activation = act
                    playbook = pb
                    break
        
        if not activation:
            return None
        
        # Calculate metrics
        total_actions = len(activation.get('coordinated_actions', []))
        completed_actions = len([a for a in activation.get('coordinated_actions', []) if a['status'] == 'completed'])
        pending_actions = len([a for a in activation.get('coordinated_actions', []) if a['status'] == 'pending'])
        
        escalations = len(activation.get('escalations', []))
        
        report = {
            'activation_id': activation_id,
            'playbook_name': playbook['name'],
            'incident_id': activation['incident_id'],
            'activation_date': activation['activation_date'],
            'participating_organizations': activation['participating_organizations'],
            'status': activation['status'],
            'coordination_metrics': {
                'total_actions': total_actions,
                'completed_actions': completed_actions,
                'pending_actions': pending_actions,
                'completion_rate': (completed_actions / total_actions * 100) if total_actions > 0 else 0
            },
            'escalations': escalations,
            'coordinated_actions': activation.get('coordinated_actions', []),
            'recommendations': self.generate_coordination_recommendations(activation)
        }
        
        return report
    
    def generate_coordination_recommendations(self, activation):
        """Generate coordination recommendations"""
        recommendations = []
        
        # Recommendations based on pending actions
        pending_actions = [a for a in activation.get('coordinated_actions', []) if a['status'] == 'pending']
        if len(pending_actions) > 0:
            recommendations.append({
                'type': 'action_completion',
                'priority': 'high',
                'description': f"Complete {len(pending_actions)} pending coordinated actions"
            })
        
        # Recommendations based on escalations
        escalations = activation.get('escalations', [])
        if len(escalations) > 2:
            recommendations.append({
                'type': 'escalation_management',
                'priority': 'medium',
                'description': f"Review escalation process - {len(escalations)} escalations"
            })
        
        # Recommendations based on duration
        if activation['status'] == 'active':
            duration = datetime.now() - activation['activation_date']
            if duration.days > 3:
                recommendations.append({
                    'type': 'duration_management',
                    'priority': 'medium',
                    'description': f"Review coordination duration - {duration.days} active days"
                })
        
        return recommendations

# Usage example
coordination = InterOrganizationalCoordination()

# Setup coordination channel
coordination.setup_coordination_channel('CHANNEL-001', {
    'name': 'Security Incident Coordination',
    'type': 'incident_response',
    'participants': ['Organization A', 'Cloud Provider', 'Security Vendor'],
    'purpose': 'Coordinate response to security incidents',
    'communication_methods': ['email', 'slack', 'phone'],
    'escalation_rules': [
        {'level': 1, 'contact': 'Security Team', 'timeframe': '1 hour'},
        {'level': 2, 'contact': 'CISO', 'timeframe': '2 hours'},
        {'level': 3, 'contact': 'CEO', 'timeframe': '4 hours'}
    ]
})

# Create shared playbook
coordination.create_shared_playbook('PLAYBOOK-001', {
    'name': 'Data Breach Response',
    'incident_type': 'data_breach',
    'participating_organizations': ['Organization A', 'Cloud Provider'],
    'roles_responsibilities': {
        'Organization A': ['Incident Commander', 'Communications Lead'],
        'Cloud Provider': ['Technical Lead', 'Forensics Lead']
    },
    'communication_protocols': {
        'initial_notification': 'Email + Phone',
        'status_updates': 'Hourly via Slack',
        'escalation': 'Phone + Email'
    },
    'response_actions': [
        {'action': 'Contain breach', 'responsible': 'Cloud Provider', 'timeframe': '1 hour'},
        {'action': 'Assess impact', 'responsible': 'Organization A', 'timeframe': '2 hours'},
        {'action': 'Notify customers', 'responsible': 'Organization A', 'timeframe': '24 hours'}
    ]
})

# Activate playbook
coordination.activate_playbook('PLAYBOOK-001', 'INC-001', {
    'activated_by': 'Security Team',
    'coordination_channel': 'CHANNEL-001',
    'escalation_contacts': ['ciso@orga.com', 'security@cloudprovider.com']
})

# Coordinate action
coordination.coordinate_response_action('ACT-1', {
    'description': 'Contain data breach',
    'responsible_organization': 'Cloud Provider',
    'supporting_organizations': ['Organization A'],
    'priority': 'critical',
    'due_date': datetime.now() + timedelta(hours=1)
})

# Generate report
report = coordination.generate_coordination_report('ACT-1')
print(f"Coordination report: {report['playbook_name']}")
print(f"Coordinated actions: {report['coordination_metrics']['total_actions']}")

Best Practices

Preparation

  • Shared Playbooks: Shared response playbooks
  • Communication Channels: Established communication channels
  • Clear Roles: Defined roles and responsibilities
  • Regular Testing: Regular coordination testing

Response

  • Early Communication: Early and frequent communication
  • Effective Coordination: Effective coordination between organizations
  • Appropriate Escalation: Appropriate escalation when necessary
  • Documentation: Complete process documentation

Follow-up

  • Post-Incident Analysis: Joint post-incident analysis
  • Lessons Learned: Share lessons learned
  • Continuous Improvement: Continuous process improvement
  • Contract Updates: Agreement updates

References