Php and Javascript mostly but really any recommendations no matter what technology they use.
Came across a nice page with some tips here
AS Workshop » The CAPTCHA Alternatives
this tip sounds good... quoted from above page
Quote:
|
I am surprised no-one has mentioned a variation on the session idea where you record the time the form was loaded. Then on the post you calculate the time difference and if its less than say 5 seconds you ignore it as spam. Of course spam bots could easily adjust for this by building in a delay, but imagine if we all did this forcing all spam bots to work more slowly we could reduce the total amount of spam for everyone. Since implementing such a system about a week ago I have not had a single item of spam get through.
|
I just checked a lot of spam I've been receiving and unfortunately it seems to be 30secs or so apart, so either bots are now going slower to mimic humans or the spam was entered manually.