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Data transfer device, transaction system and method for exchanging control and I/O data with a data processing system

  • US 6,941,404 B2
  • Filed: 12/18/2001
  • Issued: 09/06/2005
  • Est. Priority Date: 12/19/2000
  • Status: Expired due to Fees
First Claim
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1. A data transfer device, having a first data interface for exchanging data with a data processing system, a second data interface for exchanging data with a user device, and a control unit for selectively enabling data transfer between said first and second data interfaces in one of an open mode and a secure mode of operation, wherein said control unit is configured for receiving control data associated with an application to be processed by said data processing system and for providing an authentication check on said control data for setting said data transfer device in either one of the open and the secure modes of operation.

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