The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 2020
Filed:
Sep. 15, 2015
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abdul Syed-Ebrahim, Milpitas, CA (US);
Peng Ning, Saratoga, CA (US);
SJ Oh, Suwon-si, KR;
Hyunchul Woo, Seongnam-si, KR;
Sang-Hyup Cho, Suwon, KR;
Roy Heeseung Yoo, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A method and apparatus for data security incorporating device state. The method includes encrypting sensitive data written to an electronic device while the electronic device is in a locked state using a public key of an asymmetric master key pair. The method also includes, in response to detecting that the electronic device enters an unlocked state, converting asymmetric encryption of the sensitive data into symmetric encryption of the sensitive data using a symmetric master key. Encrypting of the sensitive data may include encrypting the sensitive data using a data encryption key (DEK) and encrypting the DEK using the public key. Converting of the asymmetric encryption of the sensitive data into the symmetric encryption may include decrypting the encrypted DEK using a private key of the asymmetric master key pair and re-encrypting the DEK using the symmetric master key without decrypting and re-encrypting the sensitive data.