安坦在线购买:帮助我翻文章
来源:百度文库 编辑:查人人中国名人网 时间:2024/10/06 09:46:16
Tips for selecting password length
We will estimate the time required for an exhaustive password search attack, when the password is a random sequence of lowercase Latin letters.
We suppose that one user can check 10 passwords per second and organization (with budget about $1 billion) can check 10 billions passwords per second. We also suppose that each 2 years processor doubles it's performance, so each additional Latin letter of long password adds about 9 years against exhaustive key search attack.
So we have such estimated time for attack:
Password Length Single User Attack Organization Attack
1 2 s 1 s
2 1 min 1 s
3 30 min 1 s
4 12 hours 1 s
5 14 days 1 s
6 1 year 1 s
7 10 years 1 s
8 19 years 20 s
9 26 years 9 min
10 37 years 4 hours
11 46 years 4 days
12 55 years 4 months
13 64 years 4 years
14 73 years 13 years
15 82 years 22 years
16 91 years 31 years
17 100 years 40 years
We will estimate the time required for an exhaustive password search attack, when the password is a random sequence of lowercase Latin letters.
We suppose that one user can check 10 passwords per second and organization (with budget about $1 billion) can check 10 billions passwords per second. We also suppose that each 2 years processor doubles it's performance, so each additional Latin letter of long password adds about 9 years against exhaustive key search attack.
So we have such estimated time for attack:
Password Length Single User Attack Organization Attack
1 2 s 1 s
2 1 min 1 s
3 30 min 1 s
4 12 hours 1 s
5 14 days 1 s
6 1 year 1 s
7 10 years 1 s
8 19 years 20 s
9 26 years 9 min
10 37 years 4 hours
11 46 years 4 days
12 55 years 4 months
13 64 years 4 years
14 73 years 13 years
15 82 years 22 years
16 91 years 31 years
17 100 years 40 years
翻译:选择密码长度的提示
注意选拔密码长度我们估计需详尽地搜寻密码,密码是随机排列的拉丁小写字母. 我们认为,一个用户查询密码每秒10和组织($预算约1亿美元)查询密码每秒10亿元. 我们也相信,每2年增加处理器的性能,所以每增加拉丁信长密码也对年约九详尽地搜索关键. 我们估计,这类攻击时间: 的密码长度单用户攻击组织攻击12s1款s21闽的年轻人只1款s330闽的年轻人只1款s412小时1款s514日数1s61第一年s710几年1款s819几年20个s926岁9,彭明敏欣然接受1037年4次小时1146年4次天内1255年4次个月内1364岁4岁1473岁13年内1582几年二十二年来1691几年三十一年17100几年40年来