1. Boykin P, Roychowdhury V. Optimal encryption of quantum bits. Phys Rev A, 2003, 67(4): 42317–42322; arXiv: quant-ph/0003059
2. Boykin P. Information security and quantum mechanics: Security of quantum protocols. Dissertation for the Doctoral Degree. Los Angeles: University of California, 2002
3. Ambainis A, Mosca M, Tapp A, et al. Private quantum channels. In: proceeding of the 41st Annual Symposium on Foundations of Computer Science (FOCS’2000), 2000. 547–553
4. Hayden P, Leung D, Shor P, et al. Randomizing quantum states: Constructions and applications. Commun Math Phys, 2004, 250(2): 371–391
5. LNCS;A. Ambainis,2004