Comments on: Captcha Guidelines http://priyadi.net/archives/2005/04/13/captcha-guidelines/ Changing the world, one person at a time... Thu, 20 Nov 2008 10:26:45 +0000 http://wordpress.org/?v=2.6.2 By: codeman38 http://priyadi.net/archives/2005/04/13/captcha-guidelines/#comment-19620 codeman38 Tue, 31 May 2005 17:41:20 +0000 http://priyadi.net/archives/2005/04/04/better-captcha/#comment-19620 More potentially confusing characters for #1: 2 and Z; 5 and S; 7 and T; 8 and B. With enough distortion, you can't tell them apart-- indeed, sometimes it's hard to tell O and D apart...! More potentially confusing characters for #1: 2 and Z; 5 and S; 7 and T; 8 and B. With enough distortion, you can’t tell them apart– indeed, sometimes it’s hard to tell O and D apart…!

]]> By: Jauhari http://priyadi.net/archives/2005/04/13/captcha-guidelines/#comment-12654 Jauhari Fri, 15 Apr 2005 06:03:05 +0000 http://priyadi.net/archives/2005/04/04/better-captcha/#comment-12654 Captcha? Perlu SINAU MANEH kii :(( Captcha?

Perlu SINAU MANEH kii :((

]]> By: Jaya http://priyadi.net/archives/2005/04/13/captcha-guidelines/#comment-12648 Jaya Fri, 15 Apr 2005 05:52:01 +0000 http://priyadi.net/archives/2005/04/04/better-captcha/#comment-12648 Captcha have accessibility problem. well, If you just assuming that everyone using browser with GUI interface, you could ignore this problem. Captcha have accessibility problem. well, If you just assuming that everyone using browser with GUI interface, you could ignore this problem.

]]> By: arih http://priyadi.net/archives/2005/04/13/captcha-guidelines/#comment-12635 arih Fri, 15 Apr 2005 03:42:55 +0000 http://priyadi.net/archives/2005/04/04/better-captcha/#comment-12635 hi, salam kenal... Interesting, I've always been bugged by Yahoo's capthca, because they mix letters, numbers, and case-sensitive, and I just know what that's called from your post :p I agree with #1 and #2, but I don't think #3 is necessary if the captchas are adequately human solvable. And, agree, I don't see any conflict with PWNtcha's requirements. hi, salam kenal…
Interesting, I’ve always been bugged by Yahoo’s capthca, because they mix letters, numbers, and case-sensitive, and I just know what that’s called from your post :p
I agree with #1 and #2, but I don’t think #3 is necessary if the captchas are adequately human solvable. And, agree, I don’t see any conflict with PWNtcha’s requirements.

]]> By: Bi[G] http://priyadi.net/archives/2005/04/13/captcha-guidelines/#comment-12519 Bi[G] Thu, 14 Apr 2005 15:13:16 +0000 http://priyadi.net/archives/2005/04/04/better-captcha/#comment-12519 captcha apaan sih ? temennya cap cay yah? captcha apaan sih ?
temennya cap cay yah?

]]> By: Priyadi http://priyadi.net/archives/2005/04/13/captcha-guidelines/#comment-12480 Priyadi Thu, 14 Apr 2005 04:26:54 +0000 http://priyadi.net/archives/2005/04/04/better-captcha/#comment-12480 captchas are not keys. they are a method to distinguish human and machines. they are used when human are welcomed but machines are not. a captcha incomprehensible to humans is a very bad captcha. looking at the <a href="http://sam.zoy.org/projects/pwntcha/" rel="nofollow">pwntcha</a> page, none of my guidelines above are in conflict with their requirements of a good captcha. captchas are not keys. they are a method to distinguish human and machines. they are used when human are welcomed but machines are not. a captcha incomprehensible to humans is a very bad captcha.

looking at the pwntcha page, none of my guidelines above are in conflict with their requirements of a good captcha.

]]> By: asta http://priyadi.net/archives/2005/04/13/captcha-guidelines/#comment-12465 asta Thu, 14 Apr 2005 01:45:50 +0000 http://priyadi.net/archives/2005/04/04/better-captcha/#comment-12465 Why would you use a key for your home, if it's easy to break by burglars? Why would you use a key for your home, if it’s easy to break by burglars?

]]> By: Priyadi http://priyadi.net/archives/2005/04/13/captcha-guidelines/#comment-12464 Priyadi Thu, 14 Apr 2005 01:17:26 +0000 http://priyadi.net/archives/2005/04/04/better-captcha/#comment-12464 #1: Yes, I'm aware of efforts of breaking captchas. But from users' perspective, complicated capthcas are lousy too. Not to mention it is trivial to reliably 'break' even the most complicated captchas by <a href="http://www.boingboing.net/2004/01/27/solving_and_creating.html" rel="nofollow">reusing them in other websites</a>. #1: Yes, I’m aware of efforts of breaking captchas. But from users’ perspective, complicated capthcas are lousy too. Not to mention it is trivial to reliably ‘break’ even the most complicated captchas by reusing them in other websites.

]]> By: asta http://priyadi.net/archives/2005/04/13/captcha-guidelines/#comment-12456 asta Wed, 13 Apr 2005 23:55:22 +0000 http://priyadi.net/archives/2005/04/04/better-captcha/#comment-12456 Your list describes what a bad captcha is. Some people already decode existing captchas http://sam.zoy.org/projects/pwntcha/ And if a captcha follows your list above, it will be a lousy one. Your list describes what a bad captcha is.

Some people already decode existing captchas http://sam.zoy.org/projects/pwntcha/

And if a captcha follows your list above, it will be a lousy one.

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