The first guilty act of Boxtel had been to climb over a wall in order to dig up the tulip; the second, to introduce himself into the dry-room of Cornelius, through an open window; and the third, to enter Rosa's room by means of a false key.
And in that hand, it must be understood, he held the false key which opened Rosa's door as easily as did the real one.
The orifice in the plates of the Nautilus was first closed, and fastened down by means of a false key, with which Ned Land had provided himself; the opening in the boat was also closed.
Publishing keys on a blockchain instead would in theory eliminate the risk of false key propagation and enable applications to verify the identity of the people you are communicating with.
Other innovations attributed to the Romans include the use of metal (iron) locks and the invention of the warded lock, which has fixed projections within the lock, called wards, that make it difficult for a false key to reach or withdraw the bolts.