On Thu, Aug 14, 2014 at 5:24 AM, Chris Kaynor <ckay...@zindagigames.com> wrote: > On Wed, Aug 13, 2014 at 4:39 AM, Eric S. Johansson <e...@harvee.org> wrote: >> >> eliminate captchas, 35+million disabled people would thank you as would >> many more millions of the not-yet-disabled like your future self. > > > And so would the spammers, which is who captchas are trying to block.
There are alternatives that are both easier for legit people and harder for spambots. Some rely on the fact that humans read things two dimensionally, and scripts look at the underlying structure; so, for instance, random field names and cunning CSS to match them up with their labels can result in a form that's completely messed up in the source, but looks perfect to a user. Or you can put extra fields down that you can't see if the form's laid out properly. Or you can combine those sorts of tricks with a very simple challenge-response, like "What is one plus one?" that requires some specific value to be in a specific field - and if that value occurs in the wrong field, you throw the form back to the user. For some reason, everyone's jumped on the "show some mangled text/numbers and ask the user to enter them" bandwagon, in the same way that everyone has gone for passwords that require lower/upper/digit/symbol and (in the most annoying cases) are actually length-limited to something stupid like 12 characters. Yes, maximum, not minimum. Grumble. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
