Criteria
A digital ticket must fulfill the following criteria:
- Secure (unable to alter or counterfeit)
- Portable (physical independence)
- Off-line capable
- Wide acceptability (In order to have the ticket generally accepted, some level of trust is needed.)
- User-friendly
In addition, another three requirements are also important for digital tickets, they are:
- Viewable
- The terms and description of the service should be objectively understood by both the service provider and consumer or owner, so the value of the ticket can be determined. Moreover, this is an essential property to trace the digital ticket.
- State manageable
- Tickets may also have a payment status, i.e., paid or unpaid, and/or reservation status, e.g., waiting list, reserved, or canceled. The status may be changed dynamically. In addition, the ticket ownership can be rewritten when the ticket is transferred. However, it is difficult to allow these changes while still guaranteeing security.
- (De)Composable
- Combining two or more tickets is sometimes required to obtain a service or one ticket may comprise several parts. For example, a travel ticket can comprise an accommodation ticket and a plane ticket or a car rent ticket.
Besides the criteria mentioned above, there are still several features that should be concerned, such as anonymity, transferability and repetitive usability.
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Famous quotes containing the word criteria:
“There are ... two minimum conditions necessary and sufficient for the existence of a legal system. On the one hand those rules of behavior which are valid according to the system’s ultimate criteria of validity must be generally obeyed, and on the other hand, its rules of recognition specifying the criteria of legal validity and its rules of change and adjudication must be effectively accepted as common public standards of official behavior by its officials.”
—H.L.A. (Herbert Lionel Adolphus)
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—Hubert H. Humphrey (1911–1978)
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—Steven Levy, U.S. writer. Hackers, ch. 2, “The Hacker Ethic,” pp. 27-33, Anchor Press, Doubleday (1984)