The example in the article says the police took her phone. Then her "attorney" gets on to talk instead.

Yes, having a secret code is probably the right answer. My wife's family always has, but mine doesn't. I suppose we should probably fix that.

For extra security against these text-to-speech model zero-shot clones, you might also want to use made-up gibberish words for which the pronunciation can't be reliably inferred from the spelling