Patent application number | Description | Published |
20100017617 | RADIO FREQUENCY IDENTIFICATION (RFID) SECURITY APPARATUS HAVING SECURITY FUNCTION AND METHOD THEREOF - Disclosed are a radio frequency identification (RFID) security apparatus and a method thereof. According to the RFID security method, a secure tag reader performs determining an AES key using security information received from a secure tag and generating an output key using the determined AES key, decrypting AES data received from the secure tag using the output key, and encrypting data to be transmitted to the secure tag using the output key and transmitting the data, and a secure tag performs generating an output key using an AES key and security information, and transmitting the security information to a secure tag reader, encrypting data to be transmitted to the secure tag reader using the output key, and transmitting the encrypted data to the secure tag reader, and decrypting data received from the secure tag reader using the output key. | 01-21-2010 |
20100146273 | METHOD FOR PASSIVE RFID SECURITY ACCORDING TO SECURITY MODE - Provided are a method for passive radio frequency identification (RFID) security according to a security mode. An RFID tag transmits its own current security mode to a reader and the reader drives a security protocol depending on the current security mode of the RFID tag. Also, the reader grasps the ability of the tag and then the reader drive a protocol suitable for the ability through the security mode. | 06-10-2010 |
20100150340 | DEVICE AND METHOD FOR ELLIPTIC CURVE CRYPTOSYSTEM - An exemplary embodiment of the present invention provides a method and an apparatus for minimizing a difference in data path between elliptic curve point addition and elliptic curve point doubling. An elliptic curve encryption method includes a first operation step of performing point addition for two points when two points on an elliptic curve are different from each other, and a second operation step of performing point doubling for any one point when two points on the elliptic curve are the same, wherein inverse multiplication processes and multiplication processes of the first operation step and the second operation step have the same path delay. | 06-17-2010 |
20100277287 | COMMUNICATION DATA PROTECTION METHOD BASED ON SYMMETRIC KEY ENCRYPTION IN RFID SYSTEM, AND APPARATUS FOR ENABLING THE METHOD - A communication data protection method based on symmetric key encryption, and an apparatus for enabling the method are provided. A communication data protection method using a Radio Frequency Identification (RFID) reader, the method including: receiving, from a tag, tag information including security parameter information and an encrypted Unique Item Identifier (UII); extracting the UII based on the security parameter information; transmitting, to the tag, a request message including a challenge value for replay prevention; and performing a tag authentication by receiving, from the tag, a response message including a handle and the challenge value. | 11-04-2010 |
20110044450 | METHOD AND APPARATUS FOR PROCESSING F-FUNCTION IN SEED ENCRYPTION SYSTEM - An apparatus for processing an F-function in a SEED encryption system includes: an arithmetic operation masking conversion unit for converting a logical operation mask value obtained by performing a logical operation of a SEED F-function input value and a random mask value into an arithmetic operation mask value; and a masking G-function unit for taking the arithmetic operation mask value from the arithmetic operation masking conversion unit as an input and producing an arithmetic operation output. | 02-24-2011 |
20110145595 | SECURE DEVICE AND METHOD FOR PREVENTING SIDE CHANNEL ATTACK - Provided are a secure device and method for preventing a side channel attack. The secure device includes a secure module converting plaintext data received from the outside into ciphertext data to thereby store the converted ciphertext data, or converting stored ciphertext data into plaintext data to thereby output the converted plaintext data, and a side channel attack sensing module sensing a side channel attack upon the secure module, and, according to the sensing result, allowing the secure module to stop operating, inducing malfunctions of the secure module, delaying operations of the secure module, or making the secure module a device having the secure module disabled. The secure device can safely protect an internal security algorithm and data from the side channel attack. | 06-16-2011 |
20110176678 | MASKING OPERATION METHOD AND DEVICE FOR SYMMETRIC KEY ENCRYPTED SYSTEM - A masking operation method for a symmetric key encryption system includes, when at least two Substitution-boxes (S-boxes) are input, generating a masking S-box table for one S-box which was input; and performing an operation on one masking S-box by referring to the generated masking S-box table. Further, the masking operation method for the symmetric key encryption system includes performing an operation on a remaining masking S-box for a remaining S-box, which was input, by referring to the masking S-box table. | 07-21-2011 |
20120039462 | RSA SIGNATURE METHOD AND APPARATUS - A Revest, Shamir and Adleman (RSA) signature method includes: creating an initial hidden value using a private key and an RSA modular; converting a message to a hidden message by blinding the message using the initial hidden value and the RSA modular; obtaining a result value by performing double exponentiation on the hidden message, the initial hidden value, the RSA modular and the private key; and recovering a signature value using the result value. The RSA signature method further includes updating the initial hidden value with a new hidden value after the recovering. | 02-16-2012 |
20120093308 | APPARATUS AND METHOD FOR GENERATING RANDOM DATA - Provided are an apparatus and method for generating random data to be used when masking data to be ciphered. The apparatus for generating random data according to an exemplary embodiment of the present invention is an apparatus for generating a random function using a physically unclonable function (PUF) logic. The apparatus for generating random data logically operates first data and second data using two different types of logic gates, and inverts the logical operation values selected from the logically operated first data and second data every odd sequence and then, inputs them as the second data again, thereby making it possible to form the output data as the random data. The present invention is applied to a data encryption apparatus for encrypting data to prevent a side channel attack. | 04-19-2012 |
20120163585 | MASKING ADDITION OPERATION DEVICE FOR PREVENTION OF SIDE CHANNEL ATTACK - A masking addition operation apparatus for prevention of a side channel attack, includes a random value generation unit generating a first random value for a first input, second random value for a second input, and a summation random value. The masking addition operation apparatus includes an operation part performing an operation on the first and second random values, a previous carry input, and first and second masked random values generated based on the first and second random values. The masking addition operation apparatus includes a carry generator generating a carry input using a result of the operation part; and a summation bit generator generating a summation bit using the summation random value, the first and second random values, the previous carry input and the first and second masked random values. | 06-28-2012 |
20120294439 | METHOD FOR IMPLEMENTING SYMMETRIC KEY ENCRYPTION ALGORITHM AGAINST POWER ANALYSIS ATTACKS - Disclosed is a method for implementing a symmetric key encryption algorithm against power analysis attacks, including: generating and storing an affine transform table; generating and storing a masked inversion table; and operating a masked S-box using the affine transform table and the masked inversion table. | 11-22-2012 |
20130325382 | SIDE-CHANNEL ANALYSIS APPARATUS AND METHOD BASED ON PROFILE - A side channel analysis apparatus based on a profile includes a waveform collection unit configured to collect leaked information from a target device of a side channel analysis; and a preprocessing unit configured to preprocess a waveform data correspond to the leaked information collected from the waveform collection unit before analyzing same. Further, the side channel analysis apparatus includes an analysis unit configured to analyze the waveform data preprocessed in the preprocessing unit; and a profile configuration unit configured to make each process of the waveform collection unit, the preprocessing unit, and the analysis unit into a process and configure a profile for managing each process by connection of each process. | 12-05-2013 |
20140098951 | METHOD FOR ELLIPTIC CURVE CRYPTOGRAPHY WITH COUNTERMEASURES AGAINST SIMPLE POWER ANALYSIS AND FAULT INJECTION ANALYSIS AND SYSTEM THEREOF - There are provided a method for elliptic curve cryptography with countermeasures against simple power analysis and fault injection analysis, and a system thereof. According to an aspect, there is provided a method for elliptic curve cryptography, in which an elliptic curve point operation is performed to generate an elliptic curve code, including: receiving a first point and a second point on the elliptic curve, wherein the first point is P | 04-10-2014 |
20140286486 | BLOCK ENCRYPTION METHOD AND APPARATUS - In accordance with an embodiment, the logical exclusive operation on the random number RAND and the OPc value are performed several times, the logical operation and encryption processing using a random number RAND and logical operation and encryption processing using a random number S are done in any order, which brings an increase of an attack complexity as to whether to calculate the correlation coefficient from the power consumption waveform at any point when analyzing the correlation power, whereby it is possible to defend the CPA attack effectively. | 09-25-2014 |