Creative ways of people using to authenticate.

[shirish]

Hi all,
Can people suggest any good creative ways for authenticating at websites ? Apart from captcha, have people seen some creative ways while people are signing up ?

Would be nice if people can share the e.g. and the website where they saw a good solution for the problem.

[Head_on_a_Stick]

I like the Arch forum's version:

What is the output of "date -u +%V$(uname)|sha256sum|sed 's/\W//g'"?

https://bbs.archlinux.org/register.php

[GarryRicketson]

I like the Arch forum's version:

That is a interesting one, it took 2 trys, but I got it,...but if they were using Windows, how would they solve it ?
I use one called "funcaptcha" seems to work good,
http://www.garryricketsonartworks.com/phpbbforum/ucp.php?mode=register

[Head_on_a_Stick]

but if they were using Windows, how would they solve it ?

Yes, that's why it's so good...