  A new scheme of Quantum Key Distribution is proposed using three entangled
particles in a GHZ state. Alice holds a 3-particle source and sends two
particles to Bob, keeping one with herself. Bob uses one particle to generate a
secure key, and the other to generate a master-key. This scheme should prove to
be harder to break in non-ideal situations as compared to the standard
protocols BB84 and Eckert. The scheme uses the concept of Quantum
Disentanglement Eraser. Extension to multi-partite scheme has also been
investigated.
