Patent application number | Description | Published |
20080256153 | RANDOM NUMBER SIGNAL GENERATOR USING PULSE OSCILLATOR - A random number signal generator using pulse oscillators, the generator including: a first pulse oscillator oscillating a first pulse at high speed; a second pulse oscillator oscillating a second pulse; a sampler receiving an output pulse of the first oscillator as data, receiving an output pulse of the second pulse oscillator as a clock signal, and outputting a plurality of output signals; and a digital processor generating a random number signal with a desired size by using the output signals of the sampler. | 10-16-2008 |
20090013181 | METHOD AND ATTESTATION SYSTEM FOR PREVENTING ATTESTATION REPLAY ATTACK - Provided are a method and an attestation system for preventing an attestation replay attack. The method for preventing an attestation replay attack in an attestation system including an attestation target system and an attestation request system, the method including: measuring associated components when an event that affects the integrity of the attestation target system occurs; perceiving own identity information and verifying the perceived identity information; extending the measured component and the identity information into a register and logging the measured component and the identity information; generating an attestation response message including values of the log and the register when an attestation request message is received from the attestation request system; and transmitting the generated attestation response message to the attestation request system. Therefore, the method and an attestation system may be useful to provide an additional simple mathematical operation in verifying an attestation message by preventing an attestation replay attack, and thus to minimize performance degradation in the attestation system, compared to the conventional attestation processing mechanisms. | 01-08-2009 |
20100031052 | LOW POWER HMAC ENCRYPTION APPARATUS - There are provided a low power SHA-1 hash algorithm apparatus having a low power structure and optimized to a trusted platform module (TPM) applied to a mobile trusted computing environment and a low power keyed-hash message authentication code (HMAC) encryption apparatus using the low power SHA-1 hash algorithm apparatus, the HMAC encryption apparatus including: a key padder padding key data for HMAC algorithm; an XOR operator XOR operating the padded key data and a padding constant; a data connector connecting a text to be encrypted, to data obtained by the XOR operating; a data padder padding the connected data; an SHA-1 hash algorithm part performing an SHA-1 hash algorithm on the padded data; a data selector selecting and applying one of a result of the SHA-1 hash algorithm and the text to be encrypted, to the data connector; and a controller controlling operations of the key padder, data connector, and data padder, a sequence of performing a hash algorithm of the SHA-1 hash algorithm part, and storing an operation result to read data required for performing an encryption operation and store data with memory. | 02-04-2010 |
20100104098 | CRYPTOGRAPHIC METHOD AND DEVICE FOR SCHEDULING AND COMPRESSING MESSAGE BASED ON SECURE HASH ALGORITHM - The present invention relates to a secure hash algorithm (SHA)-based message schedule operation method, a message compression operation method, and a cryptographic device performing the same. The present invention sequentially performs the message schedule operation by using an adder. Also, a memory for storing operation data input for the message schedule operation is used from a 17th round to store intermediate data generated by the message schedule operation. Further, the message compression operation is sequentially performed by using one adder. | 04-29-2010 |
20100146296 | APPARATUS AND METHOD FOR HASH CRYPTOGRAPHY - An apparatus for hash cryptography has a hardware structure that is capable of providing both secure hash algorithm (SHA)-1 hash calculation and SHA-256 hash calculation. The apparatus for hash cryptography generates a plurality of first message data corresponding to a plurality of first rounds when the SHA-1 hash calculation is performed and generates a plurality of second message data corresponding to a plurality of second rounds when the SHA-256 hash calculation is performed by using one memory, one first register, one XOR calculator, and one OR calculator, calculates a message digest by the SHA-1 hash calculation by using the plurality of first message data when the SHA-1 hash calculation is performed, and calculates a message digest by the SHA-256 by using the plurality of second message data when the SHA-256 hash calculation is performed. | 06-10-2010 |
20100146634 | DATA PROTECTION DEVICE AND METHOD - Provided is a data protecting device and method. When a specific application requests an access to sealed data, an operating system generates application identity information without interruption by the corresponding application, and writes the generated application identity information in a platform configuration register that can be reset in a trusted platform module. Upon having received the unsealing request, the trusted platform module transmits data to the application when the unsealing condition included in the sealed data block corresponds to the state value of the currently operated platform written in a platform configuration register in the trusted platform module. | 06-10-2010 |
20100161744 | SYSTEM AND METHOD FOR MOVING DIGITAL CONTENTS AMONG HETEROGENEOUS DEVICES - Provided are a system and a method for moving digital contents among heterogeneous devices. The system moves digital contents among heterogeneous devices using a remote controller and includes a movement instructing device that moves digital contents from a first device to a second device a server that is connected with the first device and the second device by a network and performs wireless communication with the movement instructing device. | 06-24-2010 |
20100171586 | RFID TAG WITH LED AND RF IDENTIFICATION MANAGING METHOD USING THE SAME - A RFID tag having a LED is provided. The RFID tag includes an antenna, a RF processor, a controller, a memory, at least one of LEDs, and a LED switching unit. The RF processor receives and transmits a wireless signal through the antenna, and modulates and demodulates transmitted and received signal and data. The controller analyzes a received data outputted from the RF signal processor and generally controls the RFID tag. The memory stores the received data in response to the controller. The LED switching unit turns on/off at least one of the LEDs in response to the controller. | 07-08-2010 |
20100315194 | SENSOR SIGNAL PROCESSOR APPARATUS - Provided is a sensor signal processor apparatus having good characteristics and providing an easy and simple interface for various sensors. The sensor signal processor apparatus includes a current source, a sensor, a ramp integrator, a comparator, and a controller. The current source generates a constant current according to a preset value, and the sensor outputs a sensor voltage using the current from the current source. The ramp integrator generates and outputs an integral voltage according to an input command, and the comparator compares the sensor voltage of the sensor with the integral voltage of the ramp integrator and outputting a result of the comparison. The controller controls the generating and outputting of the integral voltage of the ramp integrator according to the comparison result of the comparator. | 12-16-2010 |
20110154441 | ONLINE DEVELOPMENT ENVIRONMENT SERVER, ONLINE MARKETPLACE SERVER, ONLINE DEVELOPMENT ENVIRONMENT CONSTITUTING METHOD, AND DEVELOPED APPLICATION PROVIDING METHOD - An online development environment server, online marketplace server, an online development environment configuring method, and a developed application providing method are provided. The online development environment server includes: a virtual resource pool providing virtual resources including a design tool pool, an IDE/SDK pool, a service component, and a virtual server and repository pool; a virtual resource pool manager supporting to allow a developer to select a virtual resource according to a selected development environment; a virtual development environment manager establishing a virtual development environment with reference to virtual resource information through the virtual resource pool manager; a virtual operation space and view manager binding a user and a view of a virtual development environment of each group through the virtual development environment manager and the virtual resource pool manager; a presenter presenting a virtual view model constituted by being bound by the virtual operation space and view manager; and a metadata manager storing metadata configured for virtualizing an operation space and managing the same. | 06-23-2011 |
20150074434 | POWER CAPPING APPARATUS AND METHOD - A power capping apparatus including a measurement unit to measure a performance counter value and a used amount of power of the computing system before a power limit value is set. A calculation unit to calculate an energy reference value used in an energy conservation mode using the used amount of power and the performance counter value. A management unit to compare a first used amount of power measured before a power limit value is set with the power limit value when the power limit value is set, and limit the used amount of power to a value below the power limit value when the first used amount of power is greater than the power limit value, wherein the management unit outputs an error message so that a user sets the power limit value in which the energy reference value is within an effective range in the energy conservation mode. | 03-12-2015 |