南京林业大学学报(自然科学版) ›› 2005, Vol. 29 ›› Issue (05): 29-32.doi: 10.3969/j.jssn.1000-2006.2005.05.007

• 研究论文 • 上一篇    下一篇

密码系统中伪随机序列的生成方法

吕志英   

  1. 南京林业大学, 江苏 南京 210037
  • 出版日期:2005-10-18 发布日期:2005-10-18

The Generator of Pseudorandom Sequences Applied in Cryptography

LU Zhi-ying   

  1. Nanjing Forestry University, Nanjing 210037, China
  • Online:2005-10-18 Published:2005-10-18

摘要: <正>应用丛枝菌根(AM)真菌对大青杨苗木进行人工接种,摩西球囊霉(Glomus mmosseae)、根内球囊霉(G. intraradices)、弯丝球囊霉(G. sinuosa)、地表球囊霉(G. versiforme)都与盆栽大青杨苗木形成菌根复合体。菌根化苗木的主根长、地径、侧根数、根生物量均与对照苗木差异显著。苗木生物量的累积与菌根侵染率呈显著正相关(P<0.05),证明大青杨为茵根依赖性树种。G. mosseae和G. intraradices侵染率分别是64.4%和67.4%,侵染效果最好。菌根真菌使苗木根系体积增大、总吸收面积增加,特别是使苗木根系的活跃吸收面积显著增加,其中接种G. mosseae的苗木根系活跃吸收面积比是对照处理的1.64倍。根系中活跃吸收面积比与磷、钾元素含量呈显著正相关。苗木生长的盛期和末期,菌根化苗木根系过氧化物酶活性显著高于对照,而在生长后期却显著低于对照(P<0.05)。由于受菌根真菌的影响,苗木根系多酚氧化酶活性显著高于对照(P<0.05),在苗木生长盛期酶活性最强,不同菌种接种的苗木间差异不显著。

Abstract: Utilizing the common keystroke and mouse moved messages of PC as source of randomness, and applying the hash function of SHA-1 as mixing function to combine the collected source to the pool of randomness, this paper constructs a pseudorandom sequence generator. The generated sequence is tested according to the standard of FIPS 140-2 statistical tests for randomness. The results of test indicate that this generator can be applied in cryptography.

中图分类号: