Samsung Sds Co., Ltd.

Korea Advanced Institute of Science and Technology

Sk Telecom Company, Ltd.

Mando Corporation

Kookmin University

Yonsei University

Ji Hoon Cho

Joo Hee Lee

Eun Kyung Kim

Duk Jae Moon

Seong Kwang Kim

Tae Ho Lee

Min Jung Kim

Young Hyun Kim

Hyo Jin Yoon

Joo Young Lee

Chang Hoon Lee

Jin Cheol Ha

Hyung Suk Ham

Dong Guk Han

Jae Won Huh

Kyoo Hyung Han

Sang Yub Lee

Won Seok Choi

Se Won Park

Chang Joon Lee

Young Seon Lee

Bo Yeon Sim

Yong-hak Lee

Ji Hoon Kwon

Jae Seung Han

Il Ju Kim

No Seong Park

Jong Hyeok Lee

Chae Jeong Lee

Yeh Jin Shin

Keon Hee Choi

A method for training an analysis model according to an embodiment includes receiving synthetic data for original data from a client apparatus, determining a hyperparameter value for analysis model training using the synthetic data, receiving a ciphertext for the original data from the client apparatus, and training the analysis model using the determined hyperparameter value and the received cipher text.

Method and apparatus with ciphertext training analysis model

A method for generating a key stream according to an embodiment includes generating r round keys that are each N-dimensional integer vectors including elements of an integer setdefined based on a prime number t, based on a random bit string, an encryption counter, and a secret key that is an N-dimensional integer vector consisting of elements of the integer set, generating a first round output vector xby performing a modular addition operation on an initial vector and a first round key RKof the r round keys with the prime number t as a modulus, and generating a key stream that is an N-dimensional integer vector consisting of elements of the integer setfrom the first round output vector xby using a second to r-th round keys of the r round keys, and one or more first round functions and a second round function.

Method and apparatus for generating key stream

A method for preventing side-channel attack according to an embodiment includes generating an order table which includes a position index value for each bit value of a bit string that is secret information to be generated through a decryption algorithm of an NDegree Truncated Polynomial Ring Units (NTRU) LPRime algorithm, shuffling a sort order of the position index value for the each bit value in the order table based on a random number, determining a generation order for the each bit value according to the sort order of the position index value for the each bit value in the order table, and generating the secret information through the decryption algorithm. The secret information is generated by generating the each bit value according to the determined generation order.

Apparatus and method for preventing side channel attack for NTRU LPRime algorithm

A method for encryption according to an embodiment includes generating a ciphertext for a secret key that is an integer vector by using an integer-based first homomorphic encryption algorithm, generating a key stream that is the integer vector from a nonce and the secret key by using a key stream generator, encoding the key stream by using a message encoding function of the first homomorphic encryption algorithm, encoding a message that is a real vector by using a message encoding function of a real number-based second homomorphic encryption algorithm, generating a ciphertext for the message by using a result of the encoding of the key stream and a result of the encoding of the message, and transmitting the nonce, the ciphertext for the secret key, and the ciphertext for the message to an apparatus for converting a ciphertext.

Apparatus and method for encryption, apparatus and method for converting ciphertext

A message checking apparatus comprising one or more processors, the message checking apparatus includes: a uniform resource locator(URL) extracting unit to check, when a message is received, whether a URL is included in the message and extract the URL from the message; a communication unit to download an application using the URL; and an authorization/application program interface(API) verifying unit to check whether an authorization or API having a security risk is included in the application to be downloaded through the communication unit and then determine whether the URL is malicious based thereon.

Apparatus and method for checking message and user terminal

A wheel fixing unit includes: a body; a plurality of wheel connectors protruding forward from the body and connected to a tool connection hole in a wheel of a vehicle; and a cable connector protruding rearward from the body and including a connection terminal formed on a protruding end side such that a cable is connectable thereto. A calibration device using the wheel fixing unit includes: wheel fixing units respectively coupled to left and right wheels of a vehicle; a target board installed spaced apart in a direction corresponding to a vehicle body and configured such that a transmission signal of a sensor mounted on a front or rear surface of the vehicle body is reflected by a reflector and is incident on the sensor; and an interval maintaining cable connected to one end of the wheel fixing unit and one of the both sides of the target board.

Wheel fixing unit for car sensor calibration and calibration device using the same

Growing community of inventors

Seoul, South Korea

Ji Hoon Cho