Protection from screen scraping [closed]

Answer 1

One way is to create an function that takes text and position and then Serverside generate x, y pos for every character in the text, generate divs in random order containing the characters. Generate a javascript that then posision every div on right place on screen. Looks good on screen but in code behind there is no real order to fetch the text if you dont go throuh the trouble to scrape via your javascript (that can be changed dynamically every request)

Too much work and have possibly many quirks, it depends on how much text and how complicate UI you have on the site and other things.

Answer 2

Very few I think given the intention of any site is to publish (i.e. to make public) information.

• You can hide your data behind logins of course, but that's a very situational solution.

• I've seen apps which would only serve up content where the request headers indicated a web browser (rather than say anonymous or "jakarta") but that's easy to spoof and you'll lose some genuine humans.

• Then there's the possibility that you accept some scrapage but make life insurmountably hard for them by not serving content if requests are coming from the same IP at too high a rate. This suffers from not being full coverage but more importantly there is the "AOL problem" that an IP can cover many many unique human users.

Both of the last two techniques also depend heavily on having traffic intercepting technology which is an inevitable performance and/or financial outlay.

Answer 3

I never thought that preventing print screen would be possible... well what do you know, checkout the new tech - sivizion.com. With their video buffer technology there is no way to do a print screen, cool, really cool, though hard to use ... I think they license the tech also, check it out. (If I am wrong please post here how it can be hacked.) Found it here: How do I prevent print screen