CAPTCHAs
 
American Council of the Blind
Resolution 2013-07
 
Summary

 
This organization, through its Information Access Committee, strongly urges web site developers who require CAPTCHAs on their sites to utilize at least one word-based CAPTCHA alternative.
 
WHEREAS, the use of Completely Automated Public Turing Test to Tell Computers and Humans Apart (CAPTCHA) is deemed to be necessary to increase security and prove authenticity on many web sites; and
 
WHEREAS, a CAPTCHA is a type of challenge-response test used in computing to ensure that the response is not generated by a computer or automated system; and
 
WHEREAS, these challenge-response systems are critical to certain web sites in order to prevent automated systems from performing harmful and undesirable activities; and
 
WHEREAS, these CAPTCHAs commonly take the form of either visual, audio or word-based challenges; and
 
WHEREAS, visual CAPTCHAs are completely inaccessible to users of screen-reading software as they require users to enter characters displayed in a graphic; and
 
WHEREAS, audio CAPTCHAs are equally inaccessible to users who are blind or visually impaired because the characters which need to be entered are so garbled that they cannot be understood; and
 
WHEREAS, audio CAPTCHAs are inaccessible to users who are deaf-blind as they require individuals to listen to an audio file containing letters and numbers that are not easily understood; and
 
WHEREAS, word-based CAPTCHAs utilizing easy-to-solve mathematical problems are accessible to consumers who are both blind and who are deaf-blind;
 
NOW, THEREFORE, BE IT RESOLVED by the American Council of the Blind in convention assembled on the 10th day of July, 2013, at the Hyatt Regency Hotel in Columbus, Ohio, that this organization, through its Information Access Committee, strongly urge web site developers who require CAPTCHAs on their sites to utilize at least one word-based CAPTCHA alternative.
 
Adopted.
 
Marlaina Lieberg, Secretary