Compagnie Industrielle et Financiere D' Ingenierie Ingenico Patent applications |
Patent application number | Title | Published |
20140149744 | METHOD FOR OBTAINING ENCRYPTION KEYS CORRESPONDING TERMINALS, SERVER AND COMPUTER PROGRAM PRODUCTS - A method and apparatus for obtaining an encryption key for an item of data transmitted from a client to a server. The method includes: determining a number R of registers available within the client for carrying out a plurality of calculations of encryption keys; determining a maximum number N of iterations necessary for obtaining at least one encryption key at the server; obtaining a structure of data representative of a key calculation state effected within the R available registers; calculating the at least one encryption key as a function: —of the number of available registers R, by performing at most N calls to a pseudo-random function F and —of the data structure; so that the at least one encryption key can be obtained from a combination of at most T=C | 05-29-2014 |
20090144473 | CONTROL AND COMMUNICATION UNIT BETWEEN A TERMINAL AND A MICROCIRCUIT CARD - A control and communication unit is provided between a terminal and at least one microcircuit card. The unit includes a control module for a number of input signals to the card; a module for generation of a number of time diagrams for the card communication protocols; a request generation module for transmission and reception of characters based on information received from the control module, the requests being transmitted to an external module; and an interruption generation module for creating an interruption in the case of an error in a time diagram or a character received or transmitted, based on information received from the control module and for processing the interruption without a loss of characters. The generation of an interruption does not cause an interruption in the process of request generation. | 06-04-2009 |