Re: [Catalyst] The optimal captcha

[Derek Wueppelmann]

On 12-12-17 1:19 AM, Octavian Rasnita wrote:

So, I would recommend using reCaptcha only if it is absolutely necessary, for 
example if you work for a site that will probably have very very many users, 
and if you think the spammers would make the effort to create a scraper 
specially designed for that site to create accounts and submit spam.
Just to expand on this a little bit. Of several text based Captcha 
systems Google's and Recaptcha are the only ones that I know of that a 
known exploit is not known. Google's has a better success rate than 
recaptcha but in both cases you are going to get a number of users that 
need to fill out the captcha more than once. If you need to allow access 
to people who have some visual impairment then using an audio captcha 
may seem like a good idea until you realize that they are really hard to 
solve sometimes less that half of attempts can succeed.

Captcha is overkill if it is needed just to block the general spam robots that 
can work with all the sites.
This is true, if you just want to stop general spam robots you can take 
other actions to do so provide a form field that must be left blank is a 
very simple way to reduce the amount of spam provided by most spam bots. 
There are others as well. Using a Captcha does provide some advantages 
but it can also turn people away from actually using the system.


--
 o)   Derek Wueppelmann   (o
(D .   dwuep...@gmail.com  D).
((` http://www.monkeynet.ca   ( ) `


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Re: [Catalyst] The optimal captcha

[Octavian Rasnita]

There is no optimal Captcha. All of them block the access for some human users, 
so Captcha can't make the distinction between humans and non-humans, but only 
the distinction between sighted humans and anything else.

reCaptcha offers an audio alternative for the blind but it is almost 
uninteligible almost always.
And there are users which use a Braille display because they are both blind and 
deaf also...

So, I would recommend using reCaptcha only if it is absolutely necessary, for 
example if you work for a site that will probably have very very many users, 
and if you think the spammers would make the effort to create a scraper 
specially designed for that site to create accounts and submit spam.

Captcha is overkill if it is needed just to block the general spam robots that 
can work with all the sites.

--Octavian

- Original Message - 
From: 
To: "The elegant MVC web framework" 
Sent: Friday, December 14, 2012 11:33 AM
Subject: [Catalyst] The optimal captcha


> Hi!
> Needed the captcha for project. May some one recommend something about?
> 
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Re: [Catalyst] The optimal captcha

[Dimitar Petrov]

Hello Peter,

There is a trait (
https://metacpan.org/module/Catalyst::TraitFor::Controller::reCAPTCHA) for
reCAPTCHA (http://www.google.com/recaptcha) already. I would probably start
from there.


On Fri, Dec 14, 2012 at 10:33 AM, peterp...@bk.ru  wrote:

> Hi!
> Needed the captcha for project. May some one recommend something about?
>
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RE: [Catalyst] The optimal captcha

[Craig Chant]

http://www.captcha.net/

-Original Message-
From: peterp...@bk.ru [mailto:peterp...@bk.ru]
Sent: 14 December 2012 09:34
To: The elegant MVC web framework
Subject: [Catalyst] The optimal captcha

Hi!
Needed the captcha for project. May some one recommend something about?

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