Digital ticket

[1] A digital ticket must fulfill the following criteria: In addition, another three requirements are also important for digital tickets, they are: Besides the criteria mentioned above, there are still several features that should be concerned, such as anonymity, transferability and repetitive usability.

The first is the account-based system, which relies on central storage and network connections.

The second is the smartcard-based system, which uses decentralized storage to store and transfer the ticket.

Generally, the storage and maintaining tasks of the account are assigned to the service provider.

In some cases these systems could be shared by different service providers, but a need to make general agreements remains.

Several digital-cash systems deal with this by having a secret key generated at the user's PC, which remains out of hands of the service provider.

Since the account management is completely in control of the service providers, unwanted actions such as copying tickets can easily be detected and traced back by them.

The performance of current smart cards is limited, which makes asynchronous trading difficult.

Different service providers are likely to use different standards, which makes it mandatory to have a different smart cards for different kinds of tickets.