Anonymous Transmission of Quantum Information
  We propose a protocol for anonymous distribution of quantum information which can be used in two modifications. In the first modification the receiver of the message is publicly known, but the sender remains unknown (even to receiver). In the second modification the sender is known, but the receiver is unknown (even to sender). Our protocol achieves this goal with unconditional security using classical anonymous message transfer proposed by Chaum as a subprotocol. 
Jan Bouda and Josef Sprojcar