Background: The Limitations of Traditional Defenses

Traditionally, perimeter security was designed to be trusted simply by being connected to the corporate network. However, the proliferation of cloud services and remote work terminals has increased the risk of insider threats and breaches. For example, if you have lost your device, malware infection, or internal fraud, you can't guarantee safety just by having access to your internal network.
That's why it's important to think about the following in a Zero Trust model:

• "Don't trust, always verify": See user and device attributes in real time
• Principle of least privilege: grant only necessary access and no unnecessary permissions
• Context-based access: dynamic access control based on device state, location, login time, etc.

This helps maintain a safe environment, both inside and outside.

 

Identity Management Measures

Access control based on Zero Trust includes the following elements:

• User authentication
  Combines single sign-on (SSO) and multi-factor authentication (MFA) to enhance identity verification. We will build a system that does not allow intrusion by password leakage alone.
• Device management
  Check the device's OS version, security patches, encryption status, etc., and restrict access to devices that do not meet security standards.
• Access control
  Enforce role-based and risk-based dynamic policies. Grant access only to the extent necessary for your business.

These minimize the risk of internal fraud and unauthorized access to cloud services.

 

Implementation Instructions

Here are the steps to implement Zero Trust identity management:

1. Inventory of User Terminals
   List all users and devices in your organization to understand attributes and usage. Create a foundation for optimizing access rights.
2. Enhanced Authentication
   We have introduced SSO and MFA to create an environment where unauthorized access cannot be done with passwords alone. Additional authentication is also effective for high-risk users and devices.
3. Access Policy Design
   Design dynamic policies based on business roles and access frequency. Risk-based access control allows you to localize the damage in the event of a breach.
4. Establishment of an audit and log analysis system
   Integrate with SOCs and SIEMs to monitor for unauthorized access and anomalous behavior. We will develop automatic alerts and response flows when abnormalities are detected.
5. Continuous Improvement
   Regularly conduct policy updates and operational reviews to make improvements as the organizational environment and threats change.

 

What it should be

Ideally, identity management is unified across the organization, and access is dynamically controlled.

• Control access rights to the minimum necessary, both internally and externally
• Constant verification of terminal status and user attributes
• Instantly detect and respond to unauthorized access and abnormal behavior

In this situation, you can maintain a high level of security even in cloud services and remote work environments.

 

Conclusion

Identity management in the era of Zero Trust is essential for securing cloud and remote work environments.
By combining SSO, MFA, device management, and dynamic policies, you can create an environment where access can be verified at all times, both internally and externally. It is important to conduct continuous operational reviews and improvements to minimize risks across the organization.