I'm thinking of using one of these as a time-lapse camera controller. I've not thought through it entirely, but it might send images to a server across a secure connection. The power may be interrupted, or it may be switched off at night to save power etc. I'm aware that there are no current plans for a battery-backed RTC. There's no problem with time-stamping photos, as the server could take care of all that (fixup deltas etc) so long as photos are sent before the power goes off. In theory the machine could keep living in January 1970, groundhog-day for all I care.
Question is, will it be possible to authenticate against SSH/SCP without having a correct clock? I imagine certificate acceptance would be a problem if the rpi had no way of knowing the time.