In response to recent widespread cyberattacks, the Department of Homeland Security has issued a public service announcement urging Americans to adopt end-to-end encrypted messaging apps.

The FBI has also recommended that Americans utilize end-to-end encrypted communications following the compromise of U.S. telecom networks by Chinese hackers.

This significant hacking operation, known as Salt Typhoon, has been linked to hackers associated with the Chinese government and has been ongoing since at least October 2024.

CISA published a bulletin on December 18, 2024, advising highly targeted individuals, such as government employees, to assume that all their communications are at risk of interception.

Users are also encouraged to make use of additional security features such as Apple's Lockdown Mode, Apple iCloud Private Relay, and Google Play Protect.

Popular messaging apps that offer end-to-end encryption include Signal, WhatsApp, and Dust, with Signal being highly recommended for its robust security features.

Setting up a telecom PIN is advised to prevent SIM-swapping attacks, which can compromise personal information.

CISA emphasizes that while no single solution can eliminate all risks, following best practices can greatly enhance the protection of sensitive communications.

To strengthen security, users should increase multi-factor authentication (MFA) by avoiding SMS-based options and opting for hardware-based security keys or authenticator codes.

Specific recommendations for smartphone users include restricting app permissions and utilizing encrypted DNS services to enhance their security.

Regular software updates and opting for newer smartphones with better security features are also recommended to bolster defenses against cyber threats.

CISA advises against using personal VPNs while recommending the continued use of enterprise VPNs to maintain secure communications.