Security Mindset #

This document explains fundamental approaches and methods for ensuring security.

Security First Mindset #

Security is Not Added Later #

• Consider security from the design stage
• Clarify security requirements
• Early identification of security risks

Multi-layered Defense Approach #

• Don’t rely on a single measure
• Combine multiple security measures
• Ensure security at each layer

Understanding Threats #

Types of Threats #

• External Threats: Attacks from outside, malware
• Internal Threats: Unauthorized access by insiders
• Physical Threats: Device loss, theft
• Human Threats: Social engineering

Threat Assessment #

• Assess threat impact and probability
• Prioritize risks
• Balance countermeasure effectiveness and cost

Data Protection #

Classification of Confidential Information #

• Public Information: Information that can be publicly disclosed
• Internal Information: Can only be shared within the company
• Confidential Information: Requires limited access
• Top Secret: Requires highest level of protection

Data Handling #

• Principle of least privilege
• Data encryption
• Record and monitor access logs

Access Control #

Authentication and Authorization #

• Strong password policies
• Introduction of multi-factor authentication
• Role-based access control

Account Management #

• Regular account reviews
• Deletion of unnecessary accounts
• Appropriate permission management

Network Security #

Network Protection #

• Firewall configuration
• Appropriate use of VPN
• Network monitoring

Communication Encryption #

• Use of HTTPS
• Email encryption
• File transfer encryption

Software Security #

Secure Coding #

• Coding that avoids security vulnerabilities
• Input validation and sanitization
• Appropriate error handling implementation

Dependency Management #

• Rapid application of security patches
• Identify and update vulnerable libraries
• Regular monitoring of dependencies

Incident Response #

Preparation and Planning #

• Develop incident response plans
• Role assignment for response teams
• Contact information and escalation procedures

Response and Recovery #

• Rapid detection of incidents
• Identify and contain impact scope
• Recovery work and recurrence prevention measures

Security Education #

Continuous Learning #

• Collect security information
• Learn about latest threats and countermeasures
• Improve security skills

Awareness Raising #

• Regular security training
• Phishing email training
• Dissemination of security policies

Compliance #

Legal Requirements #

• Compliance with personal information protection laws
• Check and respond to industry regulations
• Compliance with international standards such as ISO27001

Documentation and Records #

• Document security policies
• Record and analyze incidents
• Record improvement activities

Continuous Improvement #

Security Assessment #

• Regular security assessments
• Conduct vulnerability scans
• Conduct penetration tests

Improvement Activities #

• Review security measures
• Respond to new threats
• Improve security processes