Here is what is true of Sensitive Compartmented Information Facilities (SCIFs):

• SCIFs are secure facilities designed for the use, storage, discussion, and electronic processing of Sensitive Compartmented Information (SCI), which is highly classified information that requires strict protection to prevent unauthorized access or leaks that could compromise national security.
• They incorporate rigorous physical security features such as reinforced walls, limited and monitored entry points, and sometimes fixed window coverings if windows are present.
• SCIFs also include technical countermeasures like electronic shielding (e.g., Faraday cages) to prevent electronic eavesdropping and signal interception.
• Access to SCIFs is strictly controlled and limited only to authorized personnel with the appropriate security clearances and a need-to-know.
• Personnel must ensure that conversations involving classified information occur only when everyone present has the proper clearance and need-to-know.
• Personal electronic devices such as cell phones, smartwatches, and recording devices are generally prohibited within SCIFs to prevent information leaks.
• SCIFs can be permanent, temporary, or portable to suit operational needs.
• Phone conversations inside SCIFs are not inherently secure and may require additional protective measures despite the secure environment.

In summary, a key true statement about SCIFs is that personnel should always assess whether everyone within listening distance has a need-to-know before discussing classified information inside these facilities, ensuring sensitive information remains protected.