[1] [1] Rakesh Sh, Prakash Hari Om,et al. Biometric and EToken integrated secure email system ［C］. 15th International Conference on Advanced Computing Technologies, ICACT 2013, Rajampet, India. IEEE Computer Society, 2013: 1-4.

[2] [2] Shao Minhua, et al. Some common attacks against certified email protocols and the countermeasures ［J］. Computer Communications, 2006, 29(15): 2759-2769.

[3] [3] Kounelis Ioannis, Muftic Sead, Loschner Jan. Secure and privacy-enhanced e-mail system based on the concept of proxies［C］. 37th International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO, Opatija, Croatia. IEEE Computer Society, 2014: 1405-1410.

[4] [4] Bennett C H, Brassard G, Crepeau C,et al. Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels ［J］. Phys. Rev. Lett., 1993, 70(13): 1895-1899.

[5] [5] Bouwmeester D, Pan J W, Mattle K, et al. Experimental quantum teleportation ［J］. Nature International Weekly Journal of Science, 1997, 390(11): 575-579.

[6] [6] Zhang Q Y, Zhan Y B, Zhang L L, et al. Schemes for splitting quantum information via tripartite entangled states ［J］. International Journal of Theoretical Physics, 2009, 48(12): 3331-3338.

[7] [7] Cheung C Y, Zhang Z J. Criterion for faithful teleportation with an arbitrary multiparticle channel ［J］. Phys. Rev. A, 2009, 80: 022327.

[8] [8] Zhang X G, Li H M, Ji H, et al. Controlled teleportation of multi-qudit quantum information ［J］. Chin. Phys., 2007, 1(10): 2880-2884.

[10] [10] Zhong Z R. A scheme for approximate conditional teleportation of entangled two-mode cavity state without Bell state measurement［J］. Chin. Phys. B, 2008, 17(5): 1614-1617.

[11] [11] Zhou X Q, Wu Y W. Discussion on building the net of quantum teleportation using three-particle entangled states ［J］. Acta Phys. Sin., 2007, 5(4): 1881-1887.

[12] [12] Zhou X Q, Wu Y W, Zhao H. Quantum teleportation internetworking and routing strategy ［J］. Acta Phys. Sin., 2011, 60(4): 040304.

[13] [13] Zhou N R, Zeng G H, et al. Quantum communication protocol for data link layer based on entanglement ［J］. Acta Phys. Sin., 2007, 5(9): 55-58.