Short Answer 
To securely use a DoD PKI token, it should only be operated on a publicly accessible computer with updated antivirus software. Additionally, ensure that the PKI token is compatible with the correct network (NIPRNet vs. SIPRNet) and manage the token properly by removing it when not in use to prevent unauthorized access.
Step 1: Secure Environment for PKI Token Use
To appropriately use a DoD Public Key Infrastructure (PKI) token, it is crucial to operate it only on a publicly accessible computer. This computer must have up-to-date antivirus software installed to provide a secure environment. This practice significantly reduces the risk of unauthorized access to sensitive information, ensuring that the token is protected from potential threats.
Step 2: Network Compatibility
It is important to recognize the differences between various networks. Specifically, a PKI token approved for NIPRNet (Non-classified IP Router Network) should not be used on SIPRNet (Secret IP Router Network). Each network has specific security requirements, and using a token designed for one network on another can result in serious security vulnerabilities, jeopardizing sensitive data.
Step 3: Token Management
Proper management of the PKI token is essential for security. The token should not be left in the system to be accessible for all tasks. Instead, it should be removed when not in use. This helps to prevent unauthorized access and ensures that sensitive information secured by the token remains protected at all times.