A method of tracking information associated with an integrated circuit on a substrate after it has been diced. The examples may include embedding a chaotic watermark in a digital image and using parameters associated with source and capture information for the digital image to both generate the chaotic watermark and to authenticate the digital image. Irradiating is conducted through the chalcogenide material to the metal effective to break a chalcogenide bond of the chalcogenide material at an interface of the metal and chalcogenide material and diffuse at least some of the metal outwardly into the chalcogenide material. A user or system administrator can remove processed media from the media storage unit by entering user or system administrator authentication data into the system. Should the first connector be inadvertently pulled backward from the mating direction, a forward facing stop surface of the tab engages, and thereby prevents further withdrawal of the first connector, with a rearward facing lock seat of the flex wall. A kernel module including logical volumes on the online storage service divides a file into block files at a fixed length and stores and manages the block files to prevent the upper-limit constraint of the file size.