Protecting Mobile Communications Against Cyber Threats
Executive Summary The Cybersecurity and Infrastructure Security Agency (CISA) has issued critical guidance to mitigate cyber espionage activities targeting telecommunications infrastructure, particularly those linked to threat actors from the People's Republic of China (PRC). These activities compromise sensitive information, including call records and private communications, posing significant risks to highly targeted individuals, such as senior government officials and executives. This report summarizes actionable best practices from CISA's guidance to protect mobile communications and mitigate risks associated with these threats. While these measures are aimed at individuals at high risk, they are universally applicable for enhancing mobile security. Recommendations Overview General Best Practices Use End-to-End Encrypted Communication: Applications like Signal provide secure messaging, voice, and video communication across platforms. Evaluate applications based on metadata collection policies and privacy-enhancing features like disappearing messages. Implement Phishing-Resistant Multifactor Authentication (MFA): Replace SMS-based MFA with FIDO-based authentication methods such as security keys (e.g., Yubico, Google…