一个生成伪随机数的超级算法【转】 - Geometry - 博客园


一个生成伪随机数的超级算法【转】 - Geometry - 博客园
这里面RSA算法是密码学三大算法之一(RSA、MD5、DES),是一种不对称密码算法。说如果满足条件:D是素数,N是两个素数(P,Q)之积,(D * E) mod ((P-1) * (Q-1))=1,那么存在C与A(范围从2到N-1)一一对应,且C=(A EXP D)mod N。A是一个有顺序的数,C就是一个看似无规律的伪随机数。Mod运算表示求模,例如7Mod3=1。意思是7除以3余1。类似地8Mod3=2,9Mod3=0。EXP表示前面数的后面数次方,AEXPD表示A的D次方。这两个运算清楚了,其它的也就没什么困难的了,*是乘法的意思,大多数理科生都清楚。
  搜了一下网络,还得加上一些条件,1,P和Q不能一样。2,e<(P-1)(Q-1)且e与(P-1)(Q-1)的最大公因数为1。
http://www.huhaoyu.com/pseudo-random-distribution-algorithm/
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