Efficient Masked Implementation for SEED Based on Combined Masking
- Authors
- Kim, HeeSeok; Cho, Young In; Choi, Dooho; Han, Dong-Guk; Hong, Seokhie
- Issue Date
- Apr-2011
- Publisher
- WILEY
- Keywords
- Side channel attacks; countermeasure; masking method; SEED
- Citation
- ETRI JOURNAL, v.33, no.2, pp.267 - 274
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- ETRI JOURNAL
- Volume
- 33
- Number
- 2
- Start Page
- 267
- End Page
- 274
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112730
- DOI
- 10.4218/etrij.11.1510.0112
- ISSN
- 1225-6463
- Abstract
- This paper proposes an efficient masking method for the block cipher SEED that is standardized in Korea. The nonlinear parts of SEED consist of two S-boxes and modular additions. However, the masked version of these nonlinear parts requires excessive RAM usage and a large number of operations. Protecting SEED by the general masking method requires 512 bytes of RAM corresponding to masked S-boxes and a large number of operations corresponding to the masked addition. This paper proposes a new-style masked S-box which can reduce the amount of operations of the masking addition process as well as the RAM usage. The proposed masked SEED, equipped with the new-style masked S-box, reduces the RAM requirements to 288 bytes, and it also reduces the processing time by 38% compared with the masked SEED using the general masked S-box. The proposed method also applies to other block ciphers with the same nonlinear operations.
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- Appears in
Collections - Graduate School > Department of Cyber Security > 1. Journal Articles
- School of Cyber Security > Department of Information Security > 1. Journal Articles
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