I think the archeologists need to agree to unwrap sarcophagus, so the logic is the same as any other blockchain – anyone with 51% control can do whatever they want, otherwise you need coordination between parties that are only incentivized to act "properly".
Oh, I didn't get that from the whitepaper. They seem to use 'archaeologist' singular a lot of the time when it's unclear if they actually mean plural. So is it like some sort of n-of-k encryption where you need a majority of the archaeologists' keys to unwrap the outer layer?
