Submitted by Meg WIthgott
Life without this:
A key is honest, in a way. An alternative is to hide away objects and ideas. The idea of "open" (as in opensource) exists only because we understand "locked." What would life be if all were there for the taking?
Granting access-- even at a distance when you're not there--with a physical or computational token.
Inventor: A person in Nineveh
Year Invented: 2,000 b.c.e.