there is hardware random number generator
所在版块：求学狮城 发贴时间：2007-09-24 19:11  评分:

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In linux, the interface is /dev/(u)random. Many crypto software use it. check http://en.wikipedia.org/wiki//dev/random

the following command gives 64 bytes of random data:

[atp@risci1 ~]$ dd if=/dev/urandom bs=64 count=1 | od
1+0 records in
1+0 records out
64 bytes (64 B) copied, 6.0784e-05 seconds, 1.1 MB/s
0000000 125047 155010 151240 044101 134716 055204 027564 056065
0000020 000400 167744 111504 136012 136674 175425 045721 005465
0000040 111165 146462 106526 175406 153705 053636 101666 057700
0000060 175272 161005 105256 053347 171741 072074 127474 042150
.
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　相关帖子 我要回复↙ ↗回到正文
在计算机上，怎么产生非伪随机数呀？ － bugzzj 　2007-09-24 11:43 (0 bytes , 679reads )
there is hardware random number generator － 吴永铮 　2007-09-24 19:11 (567 bytes , 351reads )
how random is it? － icky 　2007-09-25 09:48 (0 bytes , 345reads )
It uses temperature and electronic noise － 吴永铮 　2007-09-25 12:14 (364 bytes , 436reads )
you mean not "pseudo random numbers"? － icky 　2007-09-24 13:43 (0 bytes , 304reads )
yes. － bugzzj 　2007-09-24 14:38 (0 bytes , 371reads )
I don't know any existing algorithm generating non-pseudo random number － icky 　2007-09-24 15:22 (70 bytes , 453reads )
I thought about this question before. One solution is to have distributed comput － simon 　2007-09-25 01:47 (367 bytes , 380reads )
man, it's still deterministic, just that the model is very complicated.... :) － icky 　2007-09-25 09:46 (0 bytes , 350reads )
everything is deterministic. only difference is how complicated the generator is － simon 　2007-09-25 14:35 (42 bytes , 530reads )
yes, if everything is deterministic, how does the random come from? － icky 　2007-09-25 16:57 (32 bytes , 411reads )
it's just a ideal concept. like poisson. there's no real poisson. － simon 　2007-09-26 00:15 (298 bytes , 324reads )
agreed... "to some extent"... － icky 　2007-09-26 11:07 (0 bytes , 379reads )
nothing, just for fun. － bugzzj 　2007-09-24 15:27 (0 bytes , 421reads )
as every instruction is determined － icky 　2007-09-24 16:01 (619 bytes , 362reads )
Sometimes it is not possible to describe the world completely － 香陵居士 　2007-09-25 11:37 (27 bytes , 428reads )
maybe － bugzzj 　2007-09-24 17:18 (741 bytes , 414reads )