文档章节

Talk briefly about captcha bypass service

知码网
 知码网
发布于 2015/01/28 16:48
字数 480
阅读 14
收藏 0

    Image Captcha: Website terms of randomly generates
an image that says numbers, letters or a combination of Chinese characters, and
then asks the user to enter the contents of the image, and submits along with
the form. The main means to break the image captcha is OCR. 20 years ago, OCR
technology is still a big problem, but now has a mature solution, and OCR
technology is mainly based on the results of relevant research in artificial
intelligence neural network implementation. To deal with OCR technology, image
captcha has been upgrated, with noise background and distorted text to
interference 代答. Against the noise background is
the main method of color filter noise, and there is the shrinkage of OCR target
range, such as restrictions in the 26 letters of the alphabet to be recognized
without special symbols, etc.; to deal with distorted text interference method
is mainly based on the text texture vector and then calculate their baseline
distortion and restore the text.

Voice Captcha: It is often used as image captcha
supplement, making ??available to people with visual impairments. The method of
attack is similar as image captcha, and voice captcha is the magic weapon
against it. Of course, a lot of voice captcha also uses the background noise and
other interference, but how to deal with this kind of interference is another
issue.

Intelligence test answer captcha: Another design
ideas for 人工代答 is more interesting, but also
more difficult to attack. Its working principle is determined by the server of a
random simple common sense mental problems to end users, and allow end users to
answer. For example, there are three pieces of scenery in the four pictures, a
building, and then let the user select building; another example requires the
user to compute 5+25 is equal to the number, fill in the answer; and let the
user answer between TV, refrigerator, hair dryer and movie ticket, which is not
a household appliance. Intelligence test answer captcha has many ways, varied,
and the text can also be the theme of the picture. Want to break this captcha
with considerable difficulty, but also need the wisdom combined with advanced
computer image captcha bypass technology. But at least for the test subject can
help text natural language analysis techniques and search engines to attack. The
captcha questions in natural language word to identify SVO shape up and
construct a keyword search using Google, and then calculate the weights voting
results, you can get a "most likely the correct answer."

With the popularization of the Internet, Internet
users continues to increase, captcha bypass service requirements are
highlighted. In the face of increasingly complex captcha, 人工答题 has appeared in large numbers, which can be said to solve
all the captcha bypass problem!

© 著作权归作者所有

共有 人打赏支持
知码网
粉丝 1
博文 207
码字总数 195110
作品 0
成都
程序员
Machine Learning for Cybercriminals, Part 2

Welcome back! If you missed Part 1, you can check it out here! Machine Learning for Unauthorized Access The next step is obtaining unauthorized access to user accounts. Imagine ......

alexander polyakov
2017/12/21
0
0
eclipse启动本地程序时出现错误

14:01:28.564 [localhost-startStop-1] DEBUG [com.foton.m2m.cbm.common.repository.ConfigRepository ?.] Execute HQL: [from com.foton.m2m.cbm.common.model.Config t ], params: [null]......

窗外月光微冷
2017/05/31
65
1
iredmail安装后设置细节

后面括号中的内容为更新后的设置,也就是说有的命令和配置文件找不到了,就看括号内的内容。 希望对大家有帮助。 修改awstats默认中文 vi /etc/awstats/awstats.conf Lang=cn 关闭灰名单 vi...

wangrongyan
2014/05/30
0
0
Stack traces and the errors package

Stack traces and the errors package A few months ago I gave a presentation on my philosophy for error handling. In the talk I introduced a small package designed to support the ......

Cbping
2016/07/02
12
0
使用Jcaptcha做验证码总结

发现这个社区不错,所以也凑个热闹。 第一篇日志,一定要动手写才有诚意。

lwei
2010/10/08
17.3K
8

没有更多内容

加载失败,请刷新页面

加载更多

kubeadm部署kubernetes集群

一、环境要求 这里使用RHEL7.5 master、etcd:192.168.10.101,主机名:master node1:192.168.10.103,主机名:node1 node2:192.168.10.104,主机名:node2 所有机子能基于主机名通信,编辑...

人在艹木中
今天
6
0
Shell特殊符号总结以及cut,sort,wc,uniq,tee,tr,split命令

特殊符号总结一 * 任意个任意字符 ? 任意一个字符 # 注释字符 \ 脱义字符 | 管道符 # #号后的备注被忽略[root@centos01 ~]# ls a.txt # 备注 a.txt[root@centos01 ~]# a=1[root@centos01...

野雪球
今天
2
0
OSChina 周二乱弹 —— 程序员圣衣

Osc乱弹歌单(2018)请戳(这里) 【今日歌曲】 @达尔文:分享Skeeter Davis的单曲《The End of the World》 《The End of the World》- Skeeter Davis 手机党少年们想听歌,请使劲儿戳(这里...

小小编辑
今天
14
0
[ python import module ] 导入模块

import moudle_name ----> import module_name.py ---> import module_name.py文件路径 -----> sys.path (这里进行查找文件) # from app.web import Personimport app.web.Person as Pe......

_______-
昨天
5
0
Redis性能问题排查解决手册

一、性能相关的数据指标 通过Redis-cli命令行界面访问到Redis服务器,然后使用info命令获取所有与Redis服务相关的信息。通过这些信息来分析文章后面提到的一些性能指标。 nfo命令输出的数据可...

IT--小哥
昨天
2
0

没有更多内容

加载失败,请刷新页面

加载更多

返回顶部
顶部