If you want to put a spanner in the works of automated bots leaving spam comments on your blog, or creating fake accounts on your website, one of the things you may deploy is a CAPTCHA system.
We’ve all seen them. They are the questions (often using distorted graphics) that you get asked by a website which is trying to determine if you are a human being or an automated computer program.
Sometimes they’re not much of a hurdle for humans to jump over:
On other occasions, they may present some of us with a tricky challenge:
And although some have tried to make the task of completing a CAPTCHA fun,
others have probably made the barrier of entry too high:
A Naked Security reader has pointed me to a new CAPTCHA system, being actively promoted by the Civil Rights Defenders group.
According to the Swedish-based group, its CAPTCHA system “takes a stand for civil rights issues across the globe” and it hopes that it will “help promote and empower our partners – brave human rights defenders, who often put themselves at great risk through their engagement for other people’s rights.”
Here’s an example, where you…
Read more in my article on the Naked Security website.