A few years ago, Intel came up with a new way of generating true random bits, using a tuned flip-flop which was forced to a metastable state, and then released to a stable 0 or 1 state at 3 MHz rate.

The German team has now developed a true random number generator that uses an extra layer of randomness by making a computer memory element, a flip-flop, twitch randomly between its two states 1 or 0.