Perl Captcha Solution

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Perl Captcha Solution by andreas1234567 (Vicar) on Oct 29, 2007 at 09:38 UTC
Have you considered (the web service) ReCAPTCHA? There seems to be a Perl interface for it: Captcha::reCAPTCHA. -- Andreas	[reply]
Re^2: Perl Captcha Solution by jae_63 (Beadle) on Oct 29, 2007 at 15:11 UTC
Captcha::reCAPTCHA is pure Perl and wouldn't require root access to use a local copy. Just install it into a local user directory and use 'use lib' so that your CGI script will find it. I haven't found Captcha:reCAPTCHA to be the world's easiest software to use, but it's OK. This example is derived from one of the posted examples; you may find it useful. Note that I'm assuming that your Captcha::reCAPTCHA library is installed into a local directory, and that you've situated your public and private key files appropriately. Note that for security reasons these key files (especially the private one) shouldn't be located within web-browsable disk space. HTH ... Read more... (2 kB)	[reply] [d/l]
Re^2: Perl Captcha Solution by dsheroh (Monsignor) on Oct 29, 2007 at 14:45 UTC
Agreed that captcha services generally seem to be the way to go. The one I've used before is captchas.net (via WebService::CaptchasDotNet), but ReCAPTCHA looks like its text may be easier (for humans) to recognize.	[reply]
Re^2: Perl Captcha Solution by Anonymous Monk on Jul 04, 2009 at 05:16 UTC
And this one is also promoting his own business. Shame on you!	[reply]
Re: Perl Captcha Solution by zentara (Archbishop) on Oct 29, 2007 at 12:45 UTC
In my opinion, the easiest solution would be to generate 10,000 random captcha images on a capable local machine, then upload 1000 of them to the site, and rotate them on a weekly basis( or whatever you feel is secure enough). Those small images do not take up much disk space. I'm not really a human, but I play one on earth. Cogito ergo sum a bum	[reply]
Re^2: Perl Captcha Solution by andreas1234567 (Vicar) on Oct 29, 2007 at 14:10 UTC
Creating good CAPTCHAs is harder than one might think (see Defeating CAPTCHAs under External links at end of the article). One example is a research group at UC Berkeley Computer Vision Group claim that their Shape Contexts based approach has a 92% success rate in solving Yahoo's gimpy CAPTCHA. Of course, it all depends on what is considered to be secure enough for the given application in question. -- Andreas	[reply]
Re: Perl Captcha Solution by wazoox (Prior) on Oct 30, 2007 at 21:15 UTC
There's an idea that I think is quite good, easy to implement and better than most unreadable CAPTCHAs : display 20 thumbnails of animals (or use your preferred category) randomly arranged in a grid, and simply ask "please click on the cat" (or the dog, the pigeon or whatever). It's cute, it's easy (some CAPTCHAs are seriously unreadable for real humans too). If you think random clicks are too easy for bots, than ask "please click on the cat, then the dog, last the cow" and it should defeat any randomly clicking bot if necessary.	[reply]
Re: Perl Captcha Solution by Anonymous Monk on Oct 29, 2007 at 12:19 UTC
Those aren't root level software	[reply]
Re: Perl Captcha Solution by Anonymous Monk on Nov 19, 2007 at 22:36 UTC
Have a look at http://webspamprotect.com	[reply]
Re^2: Perl Captcha Solution by Anonymous Monk on Jul 04, 2009 at 05:12 UTC
Another pay pay version!	[reply]
Re^3: Perl Captcha Solution by Anonymous Monk on Jul 04, 2009 at 05:14 UTC
You are just promoting your own business. Shame on you!!	[reply]


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