Abstract: A method in a system comprising at least one portable data carrier, an authentication server and at least one reading device of at least one service provider which is couplable to the authentication server. The data carrier is adapted to communicate contactlessly with the reading device and comprises a security marking which can be read contactlessly by the reading device and on the basis of which the data carrier can be authenticated by the authentication server. The method comprises the step of equipping the data carrier with a data-carrier management marking that encodes a piece of data-carrier management information and readable contactlessly by a portable terminal. The method includes contactlessly reading out the data-carrier management marking by a portable terminal, transferring the data-carrier management information encoded in the data-carrier management marking to the authentication server, and managing the data carrier in the system employing the data-carrier management information.

Abstract: A method for managing portable data carriers in a system having at least one portable data carrier, an authentication server, and several service providers systems each including reading devices and a service provider unit. The reading devices may request an authentication information item of the data carrier and relay the authentication information item to the authentication server. The authentication server may authenticate the data carrier on the basis of the authentication information item and establish an application identity associated with the data carrier in the service provider system with the help of the security identity The established application identity associated with the data carrier may be transmitted from the authentication server to the reading device of the service provider system.

Abstract: A method in a system comprising at least one portable data carrier, an authentication server, and several service providers systems. The service provider systems have reading devices and a service provider unit. The method comprises the following steps: Requesting an authentication information item of the data carrier comprising a safety identity from the data carrier by a reading device of the service provider. Supplying the authentication information item by the data carrier to the reading device. Relaying the authentication information item by the reading device to the authentication server. Authenticating the data carrier by the authentication server on the basis of the authentication information item. Establishing an application identity associated with the data carrier in the service provider system by the authentication server with the help of the security identity. Transmitting the established application identity associated with the data carrier to the reading device of the service provider system.

Abstract: A method in a system comprising at least one portable data carrier, an authentication server and at least one reading device of at least one service provider which is couplable to the authentication server. The data carrier is adapted to communicate contactlessly with the reading device and comprises a security marking which can be read contactlessly by the reading device and on the basis of which the data carrier can be authenticated by the authentication server. The method comprises the step of equipping the data carrier with a data-carrier management marking that encodes a piece of data-carrier management information and readable contactlessly by a portable terminal. The method includes contactlessly reading out the data-carrier management marking by a portable terminal, transferring the data-carrier management information encoded in the data-carrier management marking to the authentication server, and managing the data carrier in the system employing the data-carrier management information.

Abstract: A method and a display preparation unit are proposed for the execution of a transaction during which transaction data are processed which have to be confirmed by a user. The display preparation unit has a converter unit which converts transaction data to be interpreted into pixel values and displays them on a monitor, an interface of its own for directly attaching an input unit via which a user confirms displayed transaction data, as well as a crypto unit for generating a signature for a record of confirmed transaction data. In a variant the confirmation can be effected by the crypto unit generating and displaying a random number which has to be inputted by the user via a conventionally attached input unit.

Abstract: A method and a display preparation unit are proposed for the execution of a transaction during which transaction data are processed which have to be confirmed by a user. The display preparation unit has a converter unit which converts transaction data to be interpreted into pixel values and displays them on a monitor, an interface of its own for directly attaching an input unit via which a user confirms displayed transaction data, as well as a crypto unit for generating a signature for a record of confirmed transaction data. In a variant the confirmation can be effected by the crypto unit generating and displaying a random number which has to be inputted by the user via a conventionally attached input unit.

Abstract: A method and a display preparation unit are proposed for the execution of a transaction during which transaction data are processed which have to be confirmed by a user. The display preparation unit (20) has a converter unit (29) which converts transaction data to be interpreted into pixel values and displays them on a monitor (6), an interface of its own for directly attaching an input unit (7) via which a user confirms displayed transaction data, as well as a crypto unit (31) for generating a signature for a record of confirmed transaction data. In a variant the confirmation can be effected by the crypto unit (31) generating and displaying a random number which has to be inputted by the user via a conventionally attached input unit (14).

Abstract: A method and a display preparation unit are proposed for the execution of a transaction during which transaction data are processed which have to be confirmed by a user. The display preparation unit (20) has a converter unit (29) which converts transaction data to be interpreted into pixel values and displays them on a monitor (6), an interface of its own for directly attaching an input unit (7) via which a user confirms displayed transaction data, as well as a crypto unit (31) for generating a signature for a record of confirmed transaction data. In a variant the confirmation can be effected by the crypto unit (31) generating and displaying a random number which has to be inputted by the user via a conventionally attached input unit (14).