Short Answer 
Effective security in a Sensitive Compartmented Information Facility (SCIF) involves proper monitor positioning away from windows to prevent visual eavesdropping, securing phone conversations using confidential methods, and enforcing a strict ‘need-to-know’ access policy to minimize unauthorized information leaks.
Step 1: Ensure Proper Monitor Positioning
To maintain the security of a Sensitive Compartmented Information Facility (SCIF), it is crucial that personnel position monitors away from windows or close the window blinds. This action prevents potential visual eavesdropping, which could compromise sensitive information. By taking this precaution, SCIFs can better protect its classified materials from unauthorized external observation.
Step 2: Secure Phone Conversations
Phone conversations within a SCIF require special attention to security, as they are not inherently secure. To prevent interception, personnel must use secure communication methods and avoid discussing sensitive information over unsecured lines. This measure is critical in ensuring that conversations remain confidential and that sensitive data is not compromised during discussions.
Step 3: Adhere to ‘Need-to-Know’ Access
Access to information within a SCIF is based on the principle of ‘need-to-know.’ Even authorized personnel may not have access to all information housed within the facility. This strict access policy helps minimize the risk of unauthorized information leaks, thereby enhancing overall security and safeguarding sensitive materials stored within the SCIF.