Afterglow of the big bang could help encrypt messages

Many encryption methods rely on security by generating large, random numbers to act as keys to encrypt or decipher information.

These keys can be spawned by certain algorithms, but mostly these are not truly random and therefore could potentially be spawned by another computer, which has the same algorithm and which could then duplicate the key.

Now physicists from Baylor University in Texas have proposed making encryption keys by using the afterglow of the big bang, the thermal radiation.