The NSA has issued a warning regarding the security of popular messaging apps like Signal and WhatsApp, indicating that user behavior poses greater risks than app vulnerabilities. Despite end-to-end encryption, millions of users remain exposed due to improper settings and linked devices. The alert was spurred by cyber incidents involving Russian influence on Ukrainian officials. Users are urged to review their app settings, unlink unknown devices, and disable group invite links to enhance security. Regular updates and careful sharing practices are vital to maintaining privacy.