Sign In robot protection

Rails
1

Sign In robot protection mean when you must write letter from image
I am looking for a articles about this subject. Need assistance.

I’m sorry for my english

2

Hi,

FunFun wrote:

Sign In robot protection mean when you must
write letter from image I am looking for a
articles about this subject. Need assistance.

Google ‘captchas’ for lots of info.

HTH,
Bill

3

Bill W. wrote:

HTH,
Bill

thanks, i really not imaging that this method was called.