Rudolf Ahlswede Ning Cai Transmission, Identification and Common Randomness Capacities for Wire-Tape Channels with Secure Feedback from the Decoder. 258-275 2006 conf/gtitc/2006 GTIT-C http://dx.doi.org/10.1007/11889342_13 db/conf/gtitc/gtitc2006.html#AhlswedeC06b