Skype has revealed that it will be including an innovative and optional lie detector feature to its popular internet telephony service.

It is termed ‘KishKish’, this software attempts to figure out whether the caller is telling a Lie by analysing the audio stream and checking for voice stress levels.

Lying causes a  ‘fight or flight’ response in humans, which makes mouth muscles tense up, which alters the pitch and tone of the voice.

“This is a really neat application, and the kind of thing we want to see more of,” said Paul Amery, director of Skype’s developer programme.

“Lie Detector is the latest in a variety of products in our premium Extras for Skype which greatly enhance the Skype communication experience.”

The software was developed by Israeli software house BATM, and is already in use by the US military.The software is available from Skype as a premium add on. No price or release date have been announced.

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