473,382 Members | 1,651 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,382 software developers and data experts.

Captcha Implementation with Javascript

Hi, I am a developer. I have been searching for best suited web development forums which provide helpful information on web development, so that I can get help from their active members for learning the Captcha Implementation with Javascript which is used to protect the website from the attack and accessing the website by machines. I have searched alot of forums but didn't get the answer. I hope any tech developer can help me in resolving the issue or provide me links of such more forums.
Sep 23 '16 #1
2 1264
Dormilich
8,658 Expert Mod 8TB
so what is your question?
Sep 23 '16 #2
gits
5,390 Expert Mod 4TB
missing a question as well - but for the sake of having some information here at least - lets first remember why a captcha is considered in the first place: Prevent machines/bots from submitting forms on a website. If the site does the captcha and its validation only clientside with javascript it renders its entire purpose useless - since it would be very easy to break. Simply load the site - overwrite the validation logic in the javascript locally and submit as much forms as you want to. A real! protection is only working with a serverside validation - so a pure Javascript Captcha is completely useless - and not even worth to be implemented (except for practicing some javascript coding) - since it cannot serve the purpose a captcha is meant for.
Sep 27 '16 #3

Sign in to post your reply or Sign up for a free account.

Similar topics

4
by: Krishna Kumar | last post by:
Hai all, I am doing a project in .net and in that project I have a problem in capturing text from an image. i.e images like CAPTCHA images . which has inbuilt text with in the image.So,...
8
by: . | last post by:
What is the fast way for a fast implementation of Python? -- JavaScript implementation of Python http://groups.google.it/group/JSython/
8
by: GS | last post by:
Guys: I have a question, Is it possible to implement pop-up window without Java script, we don't want to use java script since it might get blocked by pop-up blocker. Thanks in advance. GS.
7
by: mitchell | last post by:
hi i m using IE 6.0. i want to refresh just the captcha part when the user clicks on an image. i searched for articles on it and got a fairly good understanding of it. but i m still unable to...
4
by: xeiter | last post by:
Hi, I have a captcha script on my website located at /captcha.php. What it does it generates an image with the code, displays the image (gd2) and saves the value of the code in session. How do I...
11
by: Twayne | last post by:
Hi, Learning PHP code; playing with various methods of generating captcha codes: In the code below, how would I change the size of the text displayed in the captcha code? Is it even possible...
7
by: =?Utf-8?B?bWF0dCBw?= | last post by:
Steve Orr has a neat Captcha control: http://steveorr.net/articles/CAPTCHASP.aspx but aside from "dragging the control onto your toolbox.." Does anyone have any installation instructions: e.g....
9
by: Daniel Kaplan | last post by:
I noticed a lot of sites that do sign ups in Javascript seem to skip the Captcha part. I just want to know...is it that safe or am I missing something?
15
by: sb5309 | last post by:
When one uses CAPTCHA (form with verification code), a session is required to keep the session data. In examples that I have seen on the net, I did not see a session is closed after use. ...
10
by: jeddiki | last post by:
Hi, I have a captcha script which should pick up a background image and add some random letters to it and re-display This is the part of the form that the captcha image is part of: <span...
1
by: CloudSolutions | last post by:
Introduction: For many beginners and individual users, requiring a credit card and email registration may pose a barrier when starting to use cloud servers. However, some cloud server providers now...
0
by: Faith0G | last post by:
I am starting a new it consulting business and it's been a while since I setup a new website. Is wordpress still the best web based software for hosting a 5 page website? The webpages will be...
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 3 Apr 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome former...
0
by: ryjfgjl | last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.