After all these years, we’re still trying to find the perfect CAPTCHA technique, something that will protect against automated system signups, but still be easy and not annoying for humans. Google has just released a report on what we can only hope is a step in that direction, which they call image orientation CAPTCHA. CAPTCHA (or “Completely Automated Public Turing Test to Tell Computers and Humans Apart”) is used to prevent automated computer systems from signing up at sites or posting comments. The report,