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Improved Side-Channel Attack on DES with the First Four Rounds Masked
- Authors
- Kim, Jongsung; Hong, Seokhie; Han, Dong-Guk; Lee, Sangjin
- Issue Date
- 10월-2009
- Publisher
- WILEY
- Keywords
- Side-channel attack; truncated differential; DES
- Citation
- ETRI JOURNAL, v.31, no.5, pp.625 - 627
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- ETRI JOURNAL
- Volume
- 31
- Number
- 5
- Start Page
- 625
- End Page
- 627
- ISSN
- 1225-6463
- Abstract
- This letter describes an improved side channel attack on DES with the first four rounds masked. Our improvement is based on truncated differentials and power traces which provide knowledge of Hamming weights for the intermediate data computed during the enciphering of plaintexts. Our results support the claim that masking several outer rounds rather than all rounds is not sufficient for the ciphers to be resistant to side-channel attacks.
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