It’s not everyday I stumble across what I like to call a “paper clip” idea. These are ideas that are so simple in design that it even surpasses the intellect of the “well educated” … like the paper clip. Props to the man or woman who invented the paper clip. Well I came upon what I think is another such idea.
For years web developers have been developing way to prevent spam bot from infiltrating their sites and submitting hundreds of form entries. Thus was born the Captcha, a dynamically generated warped image of a word or phrase. The user must enter the word or phrase in the text box before submitting the form. This technology helps prevent spam bot from automatically reading the word of phrase and successfully submitting the form. Unfortunately, many times it is difficult for even the human to read the word or phrase.
Can you tell what letter (or number) that is between the 5 and 3? Neither can I.
As I was registering at another forum site I was presented with a rather unique, what I like to call a low-tech way of validating human response. Ask the user to solve a simple expression.
You simply supply the answer to the expression. The expression is dynamically generated and can contain any combination or numbers and operators. Yes, a computer would be able to recognize and calculate such an expression much faster than any human but that’s assuming that the spam bot can read the expression. Could we not use a form of Captcha technology to provide the expression and allow the human to enter the answer? One number … not some word or phrase, uppercase or lowercase, just one number.
Just a thought.