This is an interesting Tanta to know the hidden secrets of other people which I found while browsing a secret Indian Aghori Tantric text. This Tantra appears to be the ancient and middle ages counterpart of the modern day Lie Detector Test.
I the outset I would like to point out that this Tantra can only be practiced by a Siddha Aghori Tantric and not by other Sadhaks. Such Aghori Tantrics are said to have mastered the fearsome Tantra of using parts of the bodies of humans and other living beings in Aghori Prayogs.