Patent application number | Description | Published |
20090097640 | DEVICE AND METHOD FOR DETERMINING AN INVERSE OF A VALUE RELATED TO A MODULUS - A device for determining an inverse of an initial value related to a modulus, comprising a unit configured to process an iterative algorithm in a plurality of iterations, wherein an iteration includes two modular reductions and has, as an iteration loop result, values obtained by an iteration loop of an extended Euclidean algorithm. | 04-16-2009 |
20090110187 | METHOD AND APPARATUS FOR PROTECTING AN RSA CALCULATION ON AN OUTPUT BY MEANS OF THE CHINESE REMAINDER THEOREM - An apparatus for protecting an RSA calculation of an output based on input values by means of the Chinese remainder theorem, the apparatus comprising for a first determining device adapted to determine a first security parameter based on the input values, a computing device adapted to compute a control value based on the first security parameter and the input values, a calculating device adapted to calculate a modified input parameters based on the input values and the first security parameter, for a performing device adapted to perform the RSA calculation based on the modified input values to obtain a single modified output, and for a second determining device adapted to determine whether the single modified output is in a predetermined relation to the control value and applying a countermeasure in case the predetermined relation is not fulfilled. | 04-30-2009 |
20090158011 | DATA PROCESSING SYSTEM - A data processing system comprising a computer chip having a processing circuit and a chip-internal first memory and a chip-external second memory being coupled to the computer chip, wherein the processing circuit is configured to allow execution of computer programs stored in the first memory and to prevent execution of computer programs stored in the second memory when the data processing system is in a first state, and to allow execution of computer programs stored in the second memory when the data processing system is in a second state. | 06-18-2009 |
20100195821 | APPARATUS FOR CALCULATING A RESULT OF A SCALAR MULTIPLICATION - An apparatus for calculating a result of a scalar multiplication of a reference number with a reference point on an elliptic curve comprises a point selector and a processor. The point selector is configured to select randomly or pseudo-randomly an auxiliary point on the elliptic curve. The processor is configured to calculate the result of the scalar multiplication with a double-and-always-add process using the auxiliary point. | 08-05-2010 |
20120197956 | CALCULATING UNIT FOR REDUCING AN INPUT NUMBER WITH RESPECT TO A MODULUS - A calculating unit for reducing an input number with respect to a modulus, wherein the input number has input number portions of different significances, wherein the input number portions represent the input number with respect to a division number, wherein the modulus has modulus portions of different significances, and wherein the modulus portions represent the modulus with respect to the division number, includes a unit for estimating a result of an integer division of the input number by the modulus using a stored most significant portion of the number, a stored most significant portion of the modulus and the number, and for storing the estimated result in a memory of the calculating unit, and a unit for calculating a reduction result based on a subtraction of a product of the modulus and a value derived from the estimated result from the number. | 08-02-2012 |
20120213361 | SYSTEMS AND METHODS FOR DEVICE AND DATA AUTHENTICATION - Embodiments relate to systems and methods for authenticating devices and securing data. In embodiments, a session key for securing data between two devices can be derived as a byproduct of a challenge-response protocol for authenticating one or both of the devices. | 08-23-2012 |
20120237025 | DEVICE AND METHOD FOR DETERMINING AN INVERSE OF A VALUE RELATED TO A MODULUS - A device for determining an inverse of an initial value related to a modulus, comprising a unit configured to process an iterative algorithm in a plurality of iterations, wherein an iteration includes two modular reductions and has, as an iteration loop result, values obtained by an iteration loop of an extended Euclidean algorithm. | 09-20-2012 |
20130346461 | APPARATUS FOR CALCULATING A RESULT OF A SCALAR MULTIPLICATION - An apparatus for calculating a result of a scalar multiplication of a reference number with a reference point on an elliptic curve comprises a point selector and a processor. The point selector is configured to select randomly or pseudo-randomly an auxiliary point on the elliptic curve. The processor is configured to calculate the result of the scalar multiplication with a double-and-always-add process using the auxiliary point. | 12-26-2013 |
20140129837 | SYSTEMS AND METHODS FOR DEVICE AND DATA AUTHENTICATION - Embodiments relate to systems and methods for authenticating devices and securing data. In embodiments, a session key for securing data between two devices can be derived as a byproduct of a challenge-response protocol for authenticating one or both of the devices. | 05-08-2014 |
20140129840 | SYSTEMS AND METHODS FOR DEVICE AND DATA AUTHENTICATION - Embodiments relate to systems and methods for authenticating devices and securing data. In embodiments, a session key for securing data between two devices can be derived as a byproduct of a challenge-response protocol for authenticating one or both of the devices. | 05-08-2014 |