A scheme of digital ticket for personal trusted device

We propose a digital ticket scheme for PTD (personal trusted device). The ticket here is in a broad sense such that all the valuable digital tokens such as event ticket, digital money (both digital cash and digital check), digital coupon, etc. are all included. We discuss various features of digital ticket and propose a uniform ticket format for PTD. We also propose a ticket content display scheme such that it matches the small screen of PTD.