Method for producing acknowledged transaction data and corresponding device

A display preparation unit for generating pixel graphics to be outputted on a monitor with an interface for accepting graphics data from the CPU of a personal computer, an interface for transferring pixel graphics to a monitor, and an interface for obtaining an energy supply from the personal computer, comprising

• a mode control system for accepting data to be interpreted from the CPU of the personal computer,
• a converter unit which is arranged to convert data to be interpreted into pixel values,
• an interface for attaching an input unit,
• a crypto unit for generating a signature for a record of data to be interpreted, and
• a switch unit actuated by the mode control system for connecting an input unit with the crypto unit in order to enable a user to directly direct to the crypto unit via the input unit information inputted by him.

A display preparation unit for generating pixel graphics to be outputted on a monitor with an interface for accepting graphics data from the CPU of a personal computer, an interface for transferring pixel graphics to a monitor, and an interface for obtaining an energy supply from the personal computer, comprising

• a mode control system for accepting data to be interpreted from the CPU of the personal computer,
• a converter unit arranged to convert data to be interpreted into pixel values,
• a crypto unit arranged to generate alphanumeric random information and to compare it with alphanumeric random information supplied by the CPU, as well as to further generate a signature for a record of data to be interpreted, and
• a switch unit actuated by the mode control system for connecting an input unit with the crypto unit in order to enable a user to directly direct to the crypto unit via the input unit information inputted by the user.