Koninklijke Ptt Nederland N.v.

Martin Klaas De Lange

Jean Paul Boly

Rob Pieterse

Johan Van Tilburg

Mark Albert Pors

Gerrit Roelofsen

Albertus Feiken

Frank Pieter Van Pomeren

Maurice Matthias Feijen

Gerrit J Van Loo

A pointing device (1), such as a joystick, is provided comprising an integrated Dual Tone Multiple Frequency (DTMF) generator (104) for generating DTMF pointing signals in response to movements of a tiltable stick (12). Preferably, the pointing device (1) also comprises a card reader/writer (106) operatively connected with the DTMF generator (104) by means of a control device (101) for exchanging smart card commands as DTMF signals. A device according to the invention allows games to be remotely played, a smart card (2) being used to pay for the games and/or to collect prizes via a telephone network.

Device for playing games via a communications network, and a game system

Device for processing data packets

A device for encrypting or decrypting data packets. The device includes two cryptographic elements. The first cryptographic element generates processing data, based on a first starting value, for use in cryptographically processing the data packet. The second cryptographic element is arranged to generate the first starting value based on a second starting value. The second starting value is based on a previously cryptographically processed data packet.

Device for cryptographically processing data packets and method of

The invention provides a device (1) for providing a transparent exchange of commands and data between an IC card (11) and a remote terminal (42) via a communication network (41). The device (1) acoustically couples the IC card (11) with a telephone set (43). In order to speed up the exchange of data and commands, the device (1) preferably utilizes high level commands which represent several low level card commands. However, low level commands may also be transparently passed as a special high level command. The device (1) is inexpensive but allows an efficient use of IC cards for, e.g., payment and identification purposes.

Device for transparent interaction between an IC card and a remote

In a system for de-/encoding data using (de)coding devices at either end of a transmission channel, the data sometimes comprise additional synchronisation information which is used to reduce the effect of faults in the transmission channel. If this synchronisation information is not already present, it is impossible in certain cases to add such information. The invention provides a system which, regardless of the presence of additional synchronisation information, is able to reduce the effect of faults. For this purpose, each (de)coding device is provided with means for comparing sequences of encoded data with at least one predetermined code word and for setting the associated coding device to a reset state in the event of equality. Because the predetermined code word repeats statistically in the encoded data, a fault adversely affects the decoding for not more than one time interval.

System for encoding data presented with a first coding device and for

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Voorburg, Netherlands

Martin Klaas De Lange