Samsung Sds Co., Ltd.

Samsungsdsco.,ltd.

Nam Soo Jeon

Jae Seok Choi

Jae S Jeong

Do Hyoung Kim

Mi Ran Kim

Se Hyuk Noh

Won Kyoung Kim

Joo Hee Choi

Hyun Woo Jung

Ji Joong Gil

Soon Hyoung Hwang

A device-to-device (D2D) communication method is provided. According to an inventive concept, the method comprises, storing, by a first device, first authentication data including a hash chain, which is a sequential concatenation of hash values, and storing, by a second device, second authentication data including an initial hash value of the hash chain, transmitting, by the first device, a final hash value of the hash chain to the second device, determining, by the second device, whether authentication between the first and second devices has succeeded by repeatedly hashing the initial hash value stored in the second device until a hash value identical to the final hash value is returned, and if a determination is made that authentication between the first and second devices has succeeded, performing, by the first and second devices, a connection establishment process for establishing a connection between the first and second devices.

Device-to-device communication method including device-to-device authentication using hash chain

Provided is an apparatus for executing an update, which executes an update of a specific application installed in a device, the apparatus including: a predetermined value receiving unit configured to receive information on a randomly selected value among values within a predetermined range from an update providing server; an open date receiving unit configured to receive information on an update open time from the update providing server; an update time calculating unit configured to calculate an update time of the specific application by using the received information on the randomly selected value and on the update open time; an update information receiving unit configured to receive update information about the specific application after the calculated update time; and an update executing unit configured to execute an update of the specific application by using the received update information.

Apparatus and method of executing update, recording medium using the same, and server and method of providing update

Growing community of inventors

Seoul, South Korea

Nam Soo Jeon