Could our behaviour be turned into a password?

From fingerprint and iris scanners to voice verification, biometric technology is becoming an increasingly widespread security tool.

But for some people, this technology can feel intrusive and they may be unwilling to cooperate.

BBC Click's David Reid reports on how security systems are now looking at how our unique behaviour - the way we walk, talk and use computers and tablets - to confirm our identity.

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.