Securing the Supply Chain: Zero Trust Principles for Vendor Interactions
Complex supply chains in today's interdependent world present organizations with multiple vendors, partners and stakeholders that must all work together seamlessly. Due to the security risks created by this complexity, organizations should adopt zero trust vendor relationships.
Zero trust assumes that every user and system can be compromised and verifies every request as though it came from an open network. Instead of employing perimeter based security models, zero trust authenticates and authorizes every individual, device and service regardless of its physical location.
Organizations looking to protect their supply chain and vendor interactions by adhering to zero trust principles may want to consider the following measures.
Principle of least privilege
The principle of least privilege is one of the fundamental tenets of zero trust, meaning users and systems should only gain the minimum access required to complete their work successfully. Organizations should limit user privileges so as to prevent data breaches or unintended access.
As part of their obligations to clients, vendors should only have access to the resources required for fulfilling their tasks, and should only gain entry after having gone through due diligence processes.
Training plays a role here as well. Well trained staff understand how to access, navigate and use the systems and applications in front of them, so they perform their tasks accurately and efficiently. You can read more about structured enterprise training for that reason.
Multifactor authentication
Multifactor authentication provides additional protection by authenticating vendors before providing access to sensitive data and systems, so only authorized vendors gain access to resources.
Continuous monitoring and analytics
Identification of anomalous behavior or potential threats is central to zero trust environments, so organizations that adhere to zero trust must employ advanced monitoring strategies such as network traffic analysis, system log review and other data sources. This supports quick detection and response against suspected activity that threatens their security, so organizations can recognize suspicious activity and detect emerging threats before responding too slowly or too late.
Continuous vendor monitoring can assist organizations in responding to security incidents quickly. By tracking vendor activity, businesses can identify suspicious behavior and prevent data breaches.
Microsegmentation
Microsegmentation is an advanced network security strategy which involves breaking a large network into several isolated segments to make lateral movement within it harder for attackers and to reduce data breach risk.
Microsegmentation can prevent security incidents related to vendor traffic. By segmenting vendor traffic, organizations can stop attackers from leaving compromised systems or applications before they are detected by security controls.
Encryption
Encryption is essential in providing zero trust systems by protecting data in transit and at rest. Organizations can safeguard sensitive information by using encryption to protect it. Data exchanged among vendors and stakeholders can be encrypted, protecting it even if an attacker intercepts it. For background, see this overview of encryption.
Conclusion
Businesses of all sizes place great value in supply chain security. Zero trust principles protect vendor relationships while mitigating data breaches. Companies can build resilient supply chains using least privilege, multifactor authentication, continuous monitoring, microsegmentation and encryption as tools against cyber attack.
Supply chain security has never been more essential. Organizations can protect their data and systems by applying zero trust policies when engaging vendors.