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Lack of interest Antyspam

#1
One of the best antyspam I used was a simple enhancement of the random question and answer.

Instead of a question I can use photos and ask what is going on the picture. Some pictures could be used to ask more that one question.

E.g. What does she have on her shoulder?



Answer: axe
Bots, especially that xrumer soft can't read pictures as far as I didn't call the picture "axe".

Couple of dozen pics and around 40 ansews cut any bot's registration for forever.

Can we have an ability in the random q&a to show pictures, please?
 

DRE

Well-known member
#2
A better question would be "What's she holding?" If you make it too specific (shoulder), bots can guess the answer from a database. If you make the question too broad, ain't no database in existence can help.
 

lazy llama

Well-known member
#5
If the image URL could be randomised each time though pointing to the same actual image for that question that would make it even more difficult as any bot couldn't then just look up the URL in a database.
 

tenants

Well-known member
#6
look at CustomImgCaptcha, it does exactly this

example:
http://www.surreyforum.co.uk/misc/contact

  • The img url is randomised
  • You can use multiple images, which are randomly selected
  • Each image is never the same binary (quality, shade, etc... varies each time, so images can't be easily compared with a binary comparison). For every image you upload, there are more than 320K versions of it
  • You can upload your own sets
  • You can come up with your own image set ideas, and share them with others (for example you can sell/share the sets on Xenforo, eg: Funny Img Captcha, or we fight spam)
  • You can use multiple answers
  • The question is within the image, making it harder to extract, etc.
It's up to you to use questions that can not be easily brute forced (avoid answers that are yes/no, 1234567890, a colour, your url, words contained in your url)
 

tenants

Well-known member
#9
Is it possible to change the question, or is it always "What is this a picture of?"?
i.e. could you do what the OP suggests, and ask about something specific in the picture?
You can change the question "Answer the above question" (it is a phrase, so can be change in the admin ACP), but you should use the advantage of custom images to put your unique question within the image it's self
look at CustomImgCaptcha, it does exactly this
  • The question is within the image, making it harder to extract.
Putting the question within the image is more powerful

If you put the question as text, it can then be beaten using a similar mechanism as XRumers textcaptha.txt (the same way QA was beaten).
Extracting text and using a look up (local .txt /central database) to find the answer / set of answers has already been done. Text Q/A (regardless of asking about images / anything) have been beaten.

If you put the question within the image,
  • You are making it harder to extract for bots,
  • You can customise the text (making it harder to train against OCR/Neural Networks)
  • The image is more custom (the binary image will not be found anywhere else)
  • You can use tricks to make it harder for bots to recognise the text in the image (but don't make it hard for humans)
  • You can also NOT EVEN USE WORDS, some questions can be asked with very few words by making use of arrows/diagrams. It's much harder for bots to work out context when arrows / diagrams point to things within the object
That would make a pretty good set (no pun intended) ;):

hotset.jpg

Always make it human friendly.... otherwise, there's very little point