The regulations will require games in which players can kill other players to have identity authentication systems; these systems will require each player to enter their Citizen ID Card number in order to play a game.
It was originally designed an an authentication protocol, with non-repudiation added as an afterthought.
Another website, My Poupette.com, offers authentication services (for a fee), as well as a list of more general ways to tell true designer goods from fake in the article Top 10 Red Flags When Purchasing Online.
In the East the custom which has prevailed for centuries, and which is a practice at the present day, of using the seal as a stamp wherewith to print its device in ink or pigment in authentication of a document is parallel to our western habit of inscribing a signature for the same purpose.
The basics of confidentiality, authentication, and some major cryptographic algorithms are outlined in chapter two.