Abstract: The invention relates to a method of entering a security code such as particularly a common key to ensure communication in a wireless network (10) in a dataprocessing apparatus (2). A speech-recording unit (3, 6) records the pass phrase spoken by a user (1) in the form of audio data. A speech analysis unit (4) subdivides the audio data into a sequence of phonemes or groups of phonemes representing the searched security code.

Abstract: A mobile device (12) is presented that comprises a chargeable supply element (20) for supplying the mobile device with electrical power. The mobile device (12) has means for determining a charge level of the supply element (20) and at least one function unit (16). The mobile device furthermore has an authentication unit (22) for evaluating the charge level, wherein, in the event of an increase and/or a sudden change in the charge level, the authentication unit (22) at least restricts the operation of the function unit (16) until an authentication signal is entered. An anti-theft system (10) is furthermore described that comprises the mobile device (12) and a base station 14 having a second authentication unit (23), wherein authentication signals can be conveyed at least from the second authentication unit (23) to the first authentication unit (22) via a data path (30).

Abstract: A method is described of safeguarding electronic devices (1, 2, 3, 4) against unauthorized removal, in which one device (1) of the devices (1, 2, 3, 4) is automatically selected as the security device (SG) which transmits a security signal (SS) periodically and/or following receipt of an inquiry signal (RS) from one of the other devices (2, 3, 4). If one of the other devices (2, 3, 4) receives no security signal (SS) after a particular time and/or following transmission of an inquiry signal (RS), a security reaction is triggered by that device (2, 3, 4). A corresponding security system and an electronic device which can be safeguarded in said security system are also described.

Abstract: The invention relates to a security system for networks, comprising a first portable unit (1) with a memory (3) for storing a worldwide unambiguous key record (4) provided for short-range information transmission of the key record (4). At least one apparatus (2) of the network is provided with a receiving unit (7) comprising a receiver (9) for receiving the key record (4) and an evaluation component (11) of the apparatus for storing, processing and/or passing on the key record (4) or a part of the key record to a second component. Due to the key record, the apparatuses in the network acquire a secret shared key by means of which the encryption and decryption of the transmitted useful data and/or the authentication is performed.

Abstract: The invention relates to a security system for wireless networks, comprising a portable unit (1) with a key unit (3) for making a key record (4, 17, 104) available and being provided for short-range information transmission of the key record (4, 17, 104). At least one wireless apparatus (2) of the network is provided with a receiving unit (7) comprising a receiver (9) for receiving the key record (4, 17, 104) and an evaluation component (11) of the apparatus for storing, processing and/or passing on the key record (4, 17, 104) or a part of the key record to a second component. Due to the key record, the apparatuses of the wireless network acquire a secret shared key with which the encryption and decryption of the transmitted useful data and/or the authentication is performed. The unit (101) may further comprise a reading device (107) for a chip card (108), which chip card (108) preferably comprises the decoding key record (104) of copy-protected digital data.

Abstract: The invention relates to a security system for portable devices (1 to 3). The security system consists of at least one portable transmitter unit (5), at least one portable receiver unit (6) and a reaction unit (7). The transmitter unit (5) regularly transmits a signal which is regularly received by the receiver unit (6) within a range of the signal. If the receiver unit (6) does not receive a signal, the reaction unit (7) generates a warning signal and/or activates a blocking mode, which renders a portable device to be protected (1 to 3) unusable.

Abstract: A telecommunication network includes a number of mutually coupled private branch exchanges to which are assigned respective storage locations for storing switching data and which include processors for determining the most favorable route in dependence on the stored switching data to a subscriber terminal arranged inside or outside the telecommunication network. In the network, an outgoing route from one of the private branch exchanges is led through one or more of the other private branch exchanges and/or through one or more other telecommunication networks.

Abstract: The invention relates to a telecommunication system comprising a plurality of mutually coupled switching centers and at least one coupled control unit. When switching centers assign paths based on switching data stored in switching tables, switchings take place first between the coupled switching centers which have each their own switching tables containing LCR data. The respective switching center recognizes only the beginning and end of the path in the case of an incoming call, so that the call may be permanently switched to and fro between two switching centers leading to an endless loop in the case of a current overload or interruption of the path from the switching table.

Abstract: A communication system includes subscriber terminals which can be coupled via at least one switch, and to which subscriber terminals, several call numbers can be assigned for which telecommunication parameters are definable. The subscriber terminals each store respective telecommunication parameters. In the case of a change of assignment of a subscriber call number from a first subscriber terminal to a second subscriber terminal, the telecommunication parameters belonging to the subscriber call number are transmitted to the second subscriber terminal. The communication system is preferably implemented in ISDN switching systems with ISDN telephones as terminals.