154 karma · joined December 6, 2010
I smell a troll under the bridge.
1. The coordinates expand with the universe.
2. The coordinates are static and the universe just expands. Note that this isn't awful, planets and stars are always in motion. When planning inter-galactic missions you're always going to have to know where's the starting point and to calculate where the ending point will be at the relevant time.
So to say where Earth is you're going to write down a 4D vector, specifying at what time this was measured.
Btw, the article didn't mention 3D space did it?
http://blog.moertel.com/articles/2006/12/15/never-store-pass...
http://stackoverflow.com/questions/287517/encrypting-hashing...
http://www.usenix.org/publications/login/2001-11/pdfs/singer...
You could use a oneway hash at the client side as well.
If you don't want to divulge what's the hash in your database, you can add another oneway hash for whatever reaches the server.
The challenge-response can also be based on hashes.
Maybe a better example would be "is the earth rotating around the moon or is the moon around the earth?" What if the moon and earth had the same mass?