Crypto Lab Inc.

Seoul National University

Coupang, Corporation

Ulsan National Institute of Science and Technology

Duhyeong Kim

Jung Hee Cheon

Yongsoo Song

Kyoohyung Han

Tae Il Kim

Prakash Kadel

Ki Woong Jang

Ku Kang

Kyung Hoon Min

Nam Yeong Goo

Yilu Shen

Li Li

JungJoon Park

Juan Qu

Seongwook Ahn

Yongha Son

Joohee Lee

Junghee Cheon

Aaram Yun

A calculation device is disclosed. The calculation device includes: a memory storing at least one instruction and identity information; and a processor performing the at least one instruction, wherein the processor may randomly sample small elements, generate a function-processed output value by function-processing the stored identity information, and generate an encrypted text for a message by using a master public key computed using a ring having a dimension (d) represented by a power of 2 and an integer multiplication of 3 or more, the sampled small elements and the function-processed output value.

Identity-based encryption method based on lattices

A method for generating graphic display interface, comprising: receiving an request to generate a graphic display interface comprising at least a client ID; generating a plurality of graphic data structures based on at least one of the request or a priority list, each of the graphic data structures corresponding to a identifier; associating for each of the graphic data structures, an item graphic; tagging each of the graphic data structures with one or more tags, the tagging comprises: determine that the client ID matches at least one member ID; and determine, for each of the graphic data structures, that the associated identifier has a first status, and tagging the graphic data structures with a first tag upon the determination; and associating for each of the graphic data structures based on the associated tags, one of a plurality of service graphics; and generating instruction for the graphic display interface.

System and methods for pre-populating service data indication on user interface

The computer-implemented method for generating a public key and a secret key of the present disclosure comprises determining, by a processor, the secret key (s) by sampling from a distribution over {&#x2212;1, 0, 1}; determining, by a processor, a first error vector (e) by sampling from (D)and a second error value (e') by sampling from D; choosing, by a processor, a randomly uniform matrix A which satisfies A&#xb7;s=e (mod q); choosing, by a processor, a random column vector b which satisfies and determining, by a processor, the public key (pk) by (A&#x2225;b)&#x2208;R.

Method for generating public key and secret key based on module-wavy and module-LWR and method of encryption and decryption using the keys

Disclosed is a method of generating digital signature information comprising: receiving a message; computing a particular solution in which a result of calculating the particular solution in a public key becomes a function-processed output value predetermined in the received message; and generating digital signature information for the message using the computed particular solution, wherein the public key is computed using a ring having a dimension (d) represented by a power of 2 and an integer multiplication of 3 or more.

Methods of generating encryption key and digital signature based on lattices

A decryption method includes: receiving a homomorphic ciphertext; and obtaining a result value added an error value at a message from the received homomorphic ciphertext. The error is disposed on the least significant bit (LSB) side in the homogeneous ciphertext, and the message is disposed at a position adjacent to the error.

Terminal device performing homomorphic encryption, server device processing ciphertext and methods thereof

An encryption method of a terminal device includes: setting a scaling factor; and reflecting the scaling factor in a message to be encrypted, and performing encryption using a public key to generate a homomorphic ciphertext. The homomorphic encryption is, based on a decryption being performed, in a form that a result value obtained by adding an error value to a value obtained by reflecting the scaling factor in the message is restored.

An encryption method is provided. According to the encryption method, a scaling factor may be reflected in a message and then, a homomorphic ciphertext may be generated using a public key. The generated ciphertext is, when decryption is performed, generated in a form that a result value obtained by adding an error value to a value obtained by reflecting the scaling factor in the message is restored. Accordingly, a homomorphic ciphertext capable of being computed in a ciphertext state can be effectively generated.

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Seoul, South Korea

Duhyeong Kim