The US government is urging top politicians and senior officials to lock down their devices due to China's ongoing breaches of at least eight major telecom providers.

One counseling on wednesdayUS cybersecurity agency CISA said "highly targeted authorities", including those in the government, should enable advanced security features such as: Apple's Lockdown Modewhich limits the functionality of iPhones to limit the phone's overall attack surface.

The agency also recommends that authorities switch to end-to-end encrypted messaging apps like Signal. This advice came on the heels of US officials encouraged Americans They will also use encrypted messaging applications to minimize the risk of their communications being intercepted.

"Encryption is your friend; it makes your data unreadable, even if the enemy compromises your data," CISA deputy administrator Jeff Greene said in a call with reporters Wednesday.

The agency also recommends using phishing-resistant multi-factor authentication. Telecom-level account PINs To protect against SIM swapping attacks.