The use of artificial intelligence is certainly going to have a multiplier effect, but at this stage, the technology is in the embryonic stage. The use of that technology will raise the danger of fake messages being generated, but with such verbal and visual authenticity that it will be very difficult to distinguish the real from the fake.
We should perhaps consider a way of authenticating the source of the message, to confirm its official provenance. The Government of Canada is already doing this with the use of public key infrastructure, in which the stamp on an electronic certificate proves the authenticity of the message. So there are technical methods that could help.