4Rouayheb S Y E, Soljanin E. On Wiretap Network II [C]//IEEE Intl Symp Inf Theory. Nice: IEEE Press, 2007: 551- 555.
5Silva D, Kschischang F R. Security for Wiretap Networks Via Rank-Metric Codes [C]//IEEE Intl Symp Inf Theory. Toronto: IEEE Press, 2008.. 176-180.
6Bhattad K, Narayanan K R. Weakly Secure Network Coding [EB/OL]. [2007-05-22]. http://netcod, org/papers/ 06Bhattad N-final. pdf.
7Silva D, Kschischang F R. Universal Secure Network Coding Via Rank-Metric Codes [EB/OL]. [2008-11-10]. http:// arxiv, org/PS _ cache/arxiv/pdf/0809/0809. 3546vl. pdf.
8Jain K. Security Based on Network Topology Against the Wiretapping Attack [J]. IEEE Wireless Communications, 2004, 11(1): 68-71.
9Vileia J P, Lima L, Barros J. Lightweight Security for Network Coding [C]//Proc of the IEEE International Conference on Communications (ICC). Beijing: IEEE Press, 2008: 1750-1754.
10Lima L, Medard M, Barros J. Random Linear Network Coding: a Free Cipher? [C]//IEEE Intl Symp Inf Theory. Nice: IEEE Press, 2007: 546-550.