Patent application number | Description | Published |
20090031767 | STRUCTURE OF AUTOMOBILE ELECTRONIC KEY FOR SECURITY AND METHOD FOR PERFORMING FUNCTION THEREOF - Provided are a structure of an automobile electronic key for security and a method for performing the function thereof. It is determined whether at least one of a driver seat door closing signal and a brake pedal signal is on. A key fob of an automobile is requested to send the ID thereof, and the ID is received from the key fob when at least one of the driver seat door closing signal and the brake pedal signal is on. The key fob is authenticated using the received ID. An actuator is driven to move a locking member such that a car key is switched to a rotatable state when the key fob passes authentication. The actuator is driven to move the locking member such that the car key is switched to an unrotatable state when the key fob does not pass authentication. | 02-05-2009 |
20090033150 | APPARATUS AND METHOD FOR STARTING ENGINE OF AUTOMOBILE USING START-BUTTON - Provided are an apparatus and a method for starting an engine of an automobile using a start-button without a normal car key. In the apparatus and method, it is determined whether plural signals including the start-button are on. A key FOB is requested to transmit its ID, the ID is received from the key FOB, and authentication is performed on the key FOB using the received ID when the signals are on. Power is provided to a starting motor and a driving signal is applied to a motor driver to drive a motor when the key FOB passes authentication. A shaft is driven according to the operation of the motor to operate a steering column and the starting motor is driven to start the engine. A safety member is inserted into a first hole of the shaft to block the shaft from moving and rotating when the engine is started. | 02-05-2009 |
20090261945 | PASSIVE ENTRY SYSTEM AND METHOD FOR PERFORMING FUNCTION THEREOF - Provided are a passive entry system for changing a scan method to reduce battery consumption of a smart key and a method for performing a function thereof. In the passive entry system, a smart key ECU periodically transmits a low-frequency scan signal for detecting the smart key. When the smart key being in a slip state is located within a receiving radius of the scan signal, the smart key receives the scan signal and is converted into an active state. Battery consumption of the smart key can be reduced because the smart key normally being in the slip state is converted into the active state when receiving the scan signal from the smart key ECU. Furthermore, the smart key is converted into the active state only within the low-frequency scan signal receiving radius formed near an automobile and requests the smart key ECU to perform a function of the automobile, for example, a function of closing/opening doors. Accordingly, a reliable passive entry system can be achieved. | 10-22-2009 |
20110060481 | ANTITHEFT METHOD AND SYSTEM FOR MOTORCYCLES - An antitheft method and system for motorcycles are provided. The antitheft method and system for motorcycles authenticate an electronic identifier when power-up of a motorcycle or engine start-up is sensed and cut off the power-up or engine start-up if the power-up or engine start-up is not authenticated. An electronic control unit can generate a theft alarm signal in case of unauthenticated power-up or engine start-up. The motorcycle engine is automatically stopped if the engine is started through an illegal method, and thus the motorcycle is prevented from being stolen. Further, a user can confirm the electronic identifier and start the motorcycle without inserting a key into a key cylinder, and thus the user can start the motorcycle easily and rapidly. | 03-10-2011 |
20110208413 | APPARATUS AND METHOD FOR STARTING AUTOMOBILE USING START-BUTTON - Provided are an apparatus and a method for starting an engine of an automobile using a start-button without a normal car key. In the apparatus and method, it is determined whether plural signals are on when the start-button is on. A key FOB is requested to transmit an ID, receive the ID from the key FOB, and perform authentication on the key FOB using the received ID when the signals are on. Power is provided to a starting motor of the automobile and a driving signal is applied to a motor driver for driving a motor positioned within a key cylinder of the apparatus for starting the automobile when the key FOB passes authentication. A shaft is driven according to the operation of the motor to operate the starting motor to start the automobile. | 08-25-2011 |
20110261907 | WIRELESS WAKE-UP SYSTEM AND OPERATION METHOD THEREOF - A wireless wake-up system and an operation method thereof are provided to optimize power consumption when wireless data is received. The wireless wake-up system activates a wake-up detection module and then compares a wireless input signal received through an antenna with a pre-stored reference value. If the wireless input signal is equal to the reference value, the wireless wake-up system determines that the input signal is a wake-up signal with a low bit rate, and then generates a wake-up command corresponding to the wake-up signal. Also, the wireless wake-up system activates a selected module kept in an inactive state by sending the wake-up command to the selected module. The activated module may be a microcontroller unit (MCU). When the MCU is activated, the wireless wake-up system may inactivate the wake-up detection module. | 10-27-2011 |
Patent application number | Description | Published |
20100138467 | METHODS OF CALCULATING NEGATIVE INVERSE OF MODULUS - Provided is a method of calculating a negative inverse of a modulus, wherein the negative inverse, which is an essential element in Montgomery multiplication, is quickly obtained. The method includes setting a modulus, defining P obtained by converting the modulus to a negative number, and defining S obtained by subtracting 1 from P, and calculating a negative inverse of the modulus by using P and S. | 06-03-2010 |
20100293216 | Modular multiplier apparatus with reduced critical path of arithmetic operation and method of reducing the critical path of arithmetic operation in arithmetic operation apparatus - Provided are a modular multiplier apparatus in which a value of a long path carry (LPC) is predicted to reduce a critical path of an arithmetic operation of Montgomery modular multiplication, and a method of reducing the critical path of the arithmetic operation. The modular multiplier apparatus for obtaining a quotient and a result of an arithmetic operation of modular multiplication by using a modulus and two arbitrary constants includes: a reduction unit for obtaining a short path carry (SPC) included when a result of a modular arithmetic operation is obtained at a current stage, by using a medium calculation result; a carry predictor for predicting a long path carry (LPC) included when the result of the modular arithmetic operation is obtained at the current stage, by using the medium calculation result; and an accumulator for accumulating the result of the modular arithmetic operation by using the SPC and the LPC, wherein the medium calculation result is obtained by adding a result of a modular arithmetic operation obtained at a previous stage and a partial product of the two constants obtained at the current stage. | 11-18-2010 |
20110231467 | MONTGOMERY MULTIPLIER HAVING EFFICIENT HARDWARE STRUCTURE - A radix-2k Montgomery multiplier including an input coefficient generation unit to receive a multiplier, a multiplicand, a modulus, a sum and a previous sum, to generate and to output a partial product and a multiple modulus by using at least one of the multiplier, the multiplicand, the modulus and the sum, and to divide and to output the received previous sum into units of k bits, an accumulator circuit to receive the partial product, the multiple modulus and k bits of the previous sum from the input coefficient generation unit, and to generate and to output a carry and a sum by summing the partial product, the multiple modulus and the previous sum, and a carry propagation adder (CPA) circuit to generate and to output an ultimate sum by using the carry and the sum. | 09-22-2011 |
20120096062 | MODULAR CALCULATOR, OPERATION METHOD OF THE MODULAR CALCULATOR, AND APPARATUSES HAVING THE SAME - A modular calculator and a method of performing a modular calculation are provided. The modular calculator includes a first register to receive and to store a first integer, a second register to receive and to store a second integer, a calculator connected to an output terminal of the first register and an output terminal of the second register, and a controller to determine an arithmetic operation of the calculator by referring to a sign of the first integer and a sign of the second integer and to control the calculator to perform the determined arithmetic operation on one of an addition and a subtraction of the first integer and the second integer and a modulus value. | 04-19-2012 |
20120197953 | MONTGOMERY INVERSE CALCULATION DEVICE AND METHOD OF CALCULATING MONTGOMERY INVERSE USING THE SAME - A Montgomery inverse calculation device includes a plurality of registers each storing a value of a variable, a modulus register storing a modulus, a multiplier performing multiplication on the modulus. A comparator compares the value of the variable stored in each of the registers with an output value of the multiplier and generates a plurality of control signals. A plurality of shifters shifts bits of a value of a variable stored in a corresponding register among the registers in response to at least one first control signal, and a quotient generation block calculates a quotient of mod 2m with respect to values output from some of the shifters in response to a second control signal. A calculation block calculates an updated value of an output value of each of the shifters using the quotient in response to at least one third control signal. | 08-02-2012 |
20120317159 | MODULAR OPERATOR, DEVICE HAVING THE SAME, AND OPERATING METHOD THEREOF - A modular operator, a smart card including the same, and a method of operating the same are provided. The modular operator includes: an input unit configured to receive first data, second data, and a modulus; and an accumulator configured to perform an accumulation operation on the first data and a first portion of the second data, to shift the accumulation operation result to the right as much as the number of bits of the first portion, and to perform an accumulation operation on a result of a shifted accumulation operation, a second part, of the second data, which is shifted to the right as much as the number of bits of the first portion, and the modulus. | 12-13-2012 |
20130198253 | METHODS OF CALCULATING NEGATIVE INVERSE OF MODULUS - Provided is a method of calculating a negative inverse of a modulus, wherein the negative inverse, which is an essential element in Montgomery multiplication, is quickly obtained. The method includes setting a modulus, defining P obtained by converting the modulus to a negative number, and defining S obtained by subtracting 1 from P, and calculating a negative inverse of the modulus by using P and S. | 08-01-2013 |
20130262544 | ELECTRONIC MULTIPLIER AND DIGITAL SIGNAL PROCESSOR INCLUDING THE SAME - An electronic multiplier, such as a multiplication circuit, may include a partial product generator, a Booth code encoder and an accumulator. The partial product generator may generate partial product data based on a Booth code and multiplicand data. The Booth code encoder may generate the Booth code based on multiplier data. The Booth code may include a zero-generation Booth code and a zero-avoidance Booth code. The Booth code encoder may selectively generate the zero-generation Booth code or the zero-avoidance Booth code when the partial product data correspond to a partial product of zero. The accumulator accumulates the partial product data to provide a multiplication result of the multiplicand data and the multiplier data. | 10-03-2013 |
20140192977 | MUTIPLICATION METHOD AND MODULAR MULTIPLIER USING REDUNDANT FORM RECODING - A multiplication method and a modular multiplier are provided. The multiplication method includes transforming a redundant-form multiplier by adding a recoding constant to the multiplier, performing recoding by using the transformed multiplier, and performing partial multiplication between the multiplier and a multiplicand using result values of the recoding. | 07-10-2014 |