@article{HoffmannBostroemFelbinger2005, author = {Hoffmann, H. and Bostr{\"o}m, Kim and Felbinger, Timo}, title = {Comment on Secure direct communication with a quantum one-time pad}, year = {2005}, abstract = {In the paper [Phys. Rev. A 69, 052319 (2004)], a quantum direct communication protocol is proposed which is claimed to be unconditionally secure even for the case of a noisy channel. We show that this is not the case by giving an undetectable attack scheme}, language = {en} }