reCaptcha requires the ip address of the user who submitted captchaResponse. Does anyone know how reCaptcha uses this information? Recaptcha's website does not give any information on how the user's ip address will be used. Aren't there any privacy concerns here?
+1
A:
Probably to enforce rate limits, which would be pretty important for something like reCaptcha.
Igor Zevaka
2010-07-14 02:12:05