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:
Dec. 24, 2013
Filed:
May. 21, 2010
Doo Ho Choi, Daejeon, KR;
You Sung Kang, Daejeon, KR;
Ju Han Kim, Daejeon, KR;
Kyunghee OH, Daejeon, KR;
Taesung Kim, Daejeon, KR;
Yong-je Choi, Daejeon, KR;
Doo Ho Choi, Daejeon, KR;
You Sung Kang, Daejeon, KR;
Ju Han Kim, Daejeon, KR;
Kyunghee Oh, Daejeon, KR;
Taesung Kim, Daejeon, KR;
Yong-Je Choi, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
An apparatus for processing an F-function in a SEED encryption system includes: an arithmetic operation masking conversion unit for converting a logical operation mask value obtained by performing a logical operation of a SEED F-function input value and a random mask value into an arithmetic operation mask value; and a masking G-function unit for taking the arithmetic operation mask value from the arithmetic operation masking conversion unit as an input and producing an arithmetic operation output.