I think that's probably wise. Can't hurt to ask, anyway. I've thrown weirder things at him.

Do you have any thoughts on like ... would it make sense to have some sort of password or some other well-guarded way to prove we're who we say we are? This is the first time this has happened in particular [as far as they know, which is very lightly worrying], but we've had several instances where someone had to convince the rest of Riftwatch of something high stakes.

[Granitefell not least among them, but Cosima's still not keen to bring up that specific example unless it's necessary.]

I guess nothing is foolproof.