Abstract: An apparatus includes a transaction card bearing data and having an output interface capable of transmitting the data, a card reader having an input interface enabled to accept the data from the output interface of the transaction card, conversion circuitry converting the card data to an analog modulated signal, and an output pin from the card reader adapted to engage in a microphone port of a computerized appliance, the output pin providing the analog modulated signal to the port, and thence to the computerized appliance.
Abstract: A security process involves log-in and data exchange between a server and a user operating a computerized appliance. The process requires a user-specific token, independent verification of the server execution within a programmed time window. A hash created at the client side is reproduced at the server side from separate data and compared to the client hash. Too much time or incorrect hash denies access.
Abstract: A secure memory device for a smart card with a modem interface comprising a rewritable memory such as an EEPROM, a processing unit or a microprocessor, an on-chip oscillator, an ISO 7816 interface, a one-wire modem interface, and characterized in that both communication interfaces are bidirectional and share the same I/O terminal. The modem interface is exchanging data with the host in the form of a modulated signal by means of a card reader characterized by the absence of processing means.
© 2025 Justia
