This might be behind a paywall?
The gist is that the messaging apps used by Android and Apple are NOT secure when messaging each other. Ie between Android user and Apple user.
{ Chinese hacking of US networks that is reportedly “ongoing and likely larger in scale than previously understood.” Fully encrypted comms is the best defense against this compromise, and Americans are being urged to use that wherever possible.}
I assume “encrypted comms” means the Signal or Telegraph apps.
FWIW
ralph