New submitter Kkloe writes: Wired is running a profile of a gadget called Signet, which is trying to bring postage stamps into the age of high technology. Quoting: "At its core, it is a digital stamp and an app. If you want to send a parcel, you'd simply stamp it with a device that uses a laser to etch it with your name and a unique identifying pattern. After that, the USPS would pick up your package; from there, the app would prompt you to provide the name of the person you're trying to reach." I'm curious whether such a finely-detailed etching can even survive a journey. How far can you expect it to travel before all the handling and sorting make the mark unreadable to the sorting machines in the delivery office? Then you'd have to worry the post office would mark it as a fraudulent stamp (as someone has to pay for the shipping in some way) and either return it or throw it away.