US recommends encrypted messaging as Chinese hackers linger in telecom networks

An unnamed FBI official was quoted in the same report as saying that phone users "would benefit from considering using a cellphone that automatically receives timely operating system updates, responsibly managed encryption, and phishing-resistant" multifactor authentication for email accounts, social media, and collaboration tools.

(Emphasis added)

I assume by “responsibly managed encryption” they mean something that still has a backdoor, even though backdoors seem to be a significant part of the problem?