Looking Glass

Looking Glass is detection/alarm program is the counter-program for Dummy, Black Mask, and other icon-disguise programs. It can be used in Net combat or set to watch a certain area inside a datafortress. A normal anti-program roll is made; if successful, the 'runner or sysop is alerted that the target icon is disguised in some way. Looking Glass cannot tell if an icon has been edited via cyberdeck menu. It differs from SeeYa, Clairvoyance, and Hidden Virtue in that the first two see invisible Icons and the latter sees real Icons inside VRs.

Source

 * Chromebook Volume 3, pg.74