Samsung Electronics Co., Ltd.

Sung-jun Yi

Nam-geol Lee

Method of updating revocation list is disclosed. Time information of revocation list indicating registration time of most recently registered revocation entity included in revocation list of first device is extracted, and time information of revocation list indicating registration time of the most recently registered revocation entity included in the revocation list of a second device connected to the first device is also extracted. A revocation entity registered in the first device after the registration time of time information of the revocation list of the second device is copied in the revocation list of the second device, if the registration time of extracted time information of the revocation list of the first device is later than the registration time of the extracted time information of the revocation list of the second device. Thus, the revocation list can be updated by connecting the first and second devices even in an offline state.

Growing community of inventors

Seongnam-si, South Korea

Sung-jun Yi