Hi Chris! But of course quite a few people have a hearing impairment! And have said the audio capture is bad for them! What the solution for security is to get around this is going to be difficult! Colin
On 9 Nov 2011, at 19:01, Chris Blouch wrote: > My usual rules of thumb for CAPTCHA which work at Internet scale are: > > 1. Algorithmically generated puzzles which are hard for algorithms to solve > (one-way transforms) > Likewise, puzzles which are reasonably possible for real people to solve > 2. Puzzles which do not require localization > 3. Puzzles which are not susceptible to brute force attacks (high random > success rates) > > That said, it should be obvious that swirled character image captchas will > not work for those with vision impairments but this is easily remedied with > an audio version. Audio and image recognition are pretty much the two areas > that algorithms have trouble with. Common solution is multiple people > speaking on top of each other. Hard for algorithms to crack but not > impossible for real people. Playback using Sound Manager 2 > > http://www.schillmania.com/projects/soundmanager2/ > > does the heavy lifting to select native html5 or flash for the audio and do > it in a way that works for all browsers. Other than that they just have to > make sure that the audio play button is easily found in the tab order and, > once pressed, moves focus to the text input. Not much else needed beyond that. > > CB > > On 11/8/11 6:57 PM, Karen Lewellen wrote: >> Hi folks, >> For reasons that are complicated to explain I have the ear of the legal >> department at paypal -ebay. Part of the reason is that, as some of you may >> know, they are *requiring* all users to agree that that they read pdf files, >> or they will lose their account. Because of this and some other access >> issues with paypal and ebay, i have been asked to document why things like >> pdf and captcha are issues for those using adaptive tools. I have told them >> already that to assume everyone is using jaws is impractical, and that still >> browsers like lynx, with its recent edition dated June 2011, are good >> foundations for access. I have shared that pdf reaains a hurtle, and >> captcha is flat out an issue, as is stuff like flash. >> because they are serious though I want to make maximum use of this >> opportunity. What I would welcome is article information, places that >> discuss why pdf for example and captcha remain barriers. Likewise posts >> from you if you have met with issues with either service would be welcome. I >> want them to fix this for everyone, not just sweep me under the corporate >> rug. That they are shifting all document responsibility t the end user is >> disturbing, since if you have an issue say with security, you will bare the >> blame for any discrepancies in documentation. >> >> Additionally, if part of your professional life is access, share under your >> professional umbrella. If I get enough research responses, i will construct >> a solid document for them, and include as many other people as I can. >> Thanks in advance, >> Karen >> > > -- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/macvisionaries?hl=en. > -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/macvisionaries?hl=en.
