Title:
METHOD AND APPARATUS FOR GENERATING RANDOM NUMBER ON BASIS OF BLOCK CIPHER TO WHICH WHITE-BOX CRYPTOGRAPHY IS APPLIED
Document Type and Number:
WIPO Patent Application WO/2019/050343
Kind Code:
A1
Abstract:
The present invention relates to a technique for generating random numbers on the basis of a block cipher. A method for generating random numbers on the basis of a block cipher to which white-box cryptography is applied comprises the steps of: generating an internal state that includes a variable and a key used to generate a round key, each of which is externally encoded and used as plain text in a block cipher; performing a counter mode in which a lookup table generated on the basis of the key is applied to the variable, and then internally updating the internal state through an exclusive OR operation with externally encoded input data; and outputting, as random numbers, a result generated by performing the counter mode on the basis of the internally updated internal state.
Inventors:
YOO DONGCHANG (KR)
YEOM YONGJIN (KR)
KANG JOO SUNG (KR)
KIM YE WON (KR)
PARK HO JOONG (KR)
YEOM YONGJIN (KR)
KANG JOO SUNG (KR)
KIM YE WON (KR)
PARK HO JOONG (KR)
Application Number:
PCT/KR2018/010518
Publication Date:
March 14, 2019
Filing Date:
September 07, 2018
Export Citation:
Assignee:
UNIV KOOKMIN IND ACAD COOP FOUND (KR)
International Classes:
H04L9/06
Foreign References:
| KR101004269B1 | 2011-01-03 | |||
| KR101623503B1 | 2016-05-23 | |||
| KR20140132535A | 2014-11-18 | |||
| KR20140049448A | 2014-04-25 |
Other References:
ANDO N ET AL: "International Workshop on Selected Areas in Cryptography", vol. 4876, 2007, 20060817, ISBN: 978-3-642-17318-9, ISSN: 3-642-17318-7, article BRECHT WYSEURWIL, MICHIELSPAUL, GORISSENBART PRENEEL: "Cryptanalysis of White-Box DES Implementations with Arbitrary External Encodings", pages: 264 - 277, XP019085801, DOI: 10.1007/978-3-540-77360-3_17
Attorney, Agent or Firm:
JUNG, Bu Yon (KR)
Download PDF: