Chip card and method for its authentication so that a given transaction can be authorized in a data processing system, whereby the identity of the cardholder need not necessarily be revealed for all transactions
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Method and device for paying for services using a portable data carrier
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Method and system for securing data
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Method and system for data protection
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System with a portable terminal and thus connectable data carriers
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Method and system for the payment of services and portable data carrier to be used in such a system
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Method of securing data
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Electronic payment method for services
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Electronic payment method for services
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Chip card scanning system for turnstile access control - has chip card moved through open guide channel for data communication with transmission/reception device
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Additional device for an EDP device to trigger operating functions
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Smart card issuing and receiving apparatus
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Device to control an economy, and method of operating such a device
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Apparatus and method to control economical systems
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Multi-user card system
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Text processing apparatus
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Text processing machine for automatic typewriters - has two position switch which controls electronic circuit for rapid text recall
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Identification system safeguarded against misuse
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Cheques with forgery proof coding zones - are for visual and automatic reading using pressure sensitive capsules containing chemicals
