Is it really free?
Yep. If your usage becomes astronomical, I may contact you to see what we can work out - but, for now it's free.
How many words are in the database?
There are over 170,000 words in the database ranging from 2 letter words to 28 letter words.
You aren't using SSL, can't someone sniff the word when you send me the image?
The word, in non-image form, is only held on the server. The word, in text is never sent to the client; not even in encrypted form.
How many times can an image be displayed?
Just one time. After that, the image is marked as "displayed" and a new image must be generated.
How many times can a user guess at the word?
Just one time. After that, the image is marked as "used" and a new image must be generated.
Why only once? What about Internet connection problems?
One of the methods for defeating a Human Interactive Proof is to save a link to the image and have an unknowing user complete the test. This limitation of only displaying / validating an answer only once protects against this by requiring that the request come from your site.
Your sample code is only in ASP.NET, I'm using Java (or Cold Fusion, or <insert language>). Does your service work for my language?
Web services are an industry-wide standard. So, services written in ASP.NET (such as Text Disguise) can be consumed by a variety of languages.
I'm concerned about accessibility and people with limited vision. How does your service handle these instances?
We don't. Text Disguise is for sighted-users only. You need to offer offline / non-Text Disguise methods of interacting with your web site. For instance, one option is to provide an e-mail process.