公开(公告)号：US20230035988A1

公开(公告)日：2023-02-02

申请号：US17872180

申请日：2022-07-25

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： MINHO KIM ,  WIJIK LEE

IPC: G06F3/06 ,  H04L9/00

Abstract: A storage device includes a non-volatile memory, and a memory controller, wherein the memory controller encrypts plaintext to generate a homomorphic ciphertext with a first level among homomorphic ciphertexts with different levels, stores the homomorphic ciphertext with the first level in the non-volatile memory, and provides the homomorphic ciphertext with the first level in response to a request received from a host. The homomorphic ciphertext with the first level has a smallest length among the homomorphic ciphertexts with different levels.

公开(公告)号：US20230119534A1

公开(公告)日：2023-04-20

申请号：US17804851

申请日：2022-05-31

Applicant: SAMSUNG ELECTRONICS CO.,LTD.

Inventor： WIJIK LEE ,  KWANWOO NOH ,  HYEONJONG SONG

IPC: G11C11/4096 ,  G11C11/4078 ,  G11C11/4074

Abstract: A nonvolatile memory device includes a plurality of memory cells that have a first state and a second state different from each other. A method of searching a read voltage of the nonvolatile memory device includes determining a number n that represents a number of times a data read operation is performed, selecting n read voltage levels of the read voltage such that a number of read voltage levels is equal to the number of times the data read operation, where the n read voltage levels differ from each other, generating n cell count values by performing n data read operations on the plurality of memory cells using all of the n read voltage levels, and generating an optimal read voltage level of the read voltage by performing a regression analysis based on a first-order polynomial using the n read voltage levels and the n cell count values.

公开(公告)号：US20220094521A1

公开(公告)日：2022-03-24

申请号：US17343318

申请日：2021-06-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： YOUNGSIK MOON ,  WIJIK LEE ,  HONGRAK SON

IPC: H04L9/00 ,  G06F21/60 ,  H04L9/08

Abstract: An encryption device includes: a parameter generating circuit configured to generate an encryption parameter including a number of initial valid bits based on an operation scenario; an encryption circuit configured to generate a cipher text by encrypting a plain text received from the outside, based on the encryption parameter; an operation circuit configured to generate a final cipher text by performing a plurality of operations on the cipher text according to the operation scenario and tag, to the final cipher text, history information of the operations performed on the final cipher text; and a decryption circuit configured to generate a decrypted plain text by decrypting the final cipher text and output a number of reliable bits of the decrypted plain text based on the history information.

公开(公告)号：US20230145500A1

公开(公告)日：2023-05-11

申请号：US17984052

申请日：2022-11-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： HEESEOK EUN ,  WIJIK LEE

IPC: H04L9/32 ,  H04L9/14

CPC classification number: H04L9/3231 ,  H04L9/14

Abstract: An authentication method including, at an apparatus—generating a master secret key and a master public key, generating a secret key and a public key using enrollment target personal information, the master secret key and the master public key, and generating first information using the enrollment target personal information. Communicating the secret key and the first information from the apparatus to the authentication server, storing the secret key and the first information in a secure area of the authentication server, generating at the apparatus, a ciphertext encrypted using authentication target personal information and the public key, second information using the authentication target personal information and communicating the ciphertext and the second information from the apparatus to the authentication server. At the authentication server, performing an authentication of the authentication target personal information using the secret key, the first information, the ciphertext and the second information, wherein the performing of the authentication of the authentication target personal information includes calculating a similarity between the enrollment target personal information and the authentication target personal information by computing an Euclidean distance of the enrollment target personal information and the authentication target personal information, and the performing of the authentication of the authentication target personal information is performed in relation to the similarity.