Electronics and Telecommunications Research Institute

Kyunghee Oh

Doo Ho Choi

Yong-Je Choi

Ju Han Kim

Taesung Kim

You Sung Kang

Seung Kwang Lee

Hyun Ju Cho

Jeong Nyeo Kim

Byung Ho Chung

Byung-Ho Chung

Kyo-Il Chung

You-Sung Kang

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.

Side-channel analysis apparatus and method based on profile

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.

Block encryption method and apparatus

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.

Masking addition operation device for prevention of side channel attack

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.

Method and apparatus for processing F-function in seed encryption system

A system for updating a radio frequency identification (RFID) tag value of a transferred object is contemplated. The RFID tag is updated by having a transferor's RFID reader read an RFID tag attached to an object being transferred and extracting a first RFID tag value. An open RFID value is deciphered through the extracted first RFID tag value. Then, the transferor's RFID reader transmits the first RFID tag value and open RFID value to an RFID reader of a transferee who is receiving the object having the attached RFID tag. The transferee's RFID reader extracts a second RFID tag value of the RFID tag of the transferred object. By using the received first RFID tag value and open RFID value, the second RFID tag value is updated. Accordingly, even using RFID, the property rights of an object having an attached RFID tag can be transferred while maintaining security.

Method and system for updating RFID tag value of transferred object

An apparatus for dynamically managing a group transient key (GTK) and a method thereof in order to perform setting of a GTK successfully by an access point (AP). Wherein, the AP checks security state of a plurality of mobile stations (MS)s connecting to the AP, and exchanges and sets a GTK for authenticated MSs. The apparatus for managing a GTK in a wireless LAN system, the apparatus including: a GTK generation timing deciding unit for deciding timing to generate a GTK based on security state of an MS; a GTK generating unit for generating a GTK according to the GTK generation timing decided in the GTK generation timing deciding unit; a GTK exchanging unit for exchanging the GTK generated in the GTK generating unit based on the security state of the MS; and a GTK setting unit for setting the GTK based on the number of MSs exchanged the GTK.

Growing community of inventors

Daejeon, South Korea

Kyunghee Oh