Cryptography – Particular algorithmic function encoding
Reexamination Certificate
2005-04-15
2011-11-08
Shiferaw, Eleni (Department: 2437)
Cryptography
Particular algorithmic function encoding
C380S029000, C713S189000, C713S193000
Reexamination Certificate
active
08054967
ABSTRACT:
A computer system having resistance to timing attacks based on measuring processing times by encrypting or decrypting a plain text or ciphertext by converting the partial data related to the plain text or the encrypted text into conversion data. In the system, a conversion table includes one piece of conversion data corresponding to the partial data at a start position of a line table area and includes data not associated with the conversion in the other position. In the system, a computer program includes an operation instruction for calculating a predetermined position of the conversion data in the conversion table by using acquired partial data and a read instruction for reading out the conversion data from the calculated position.
REFERENCES:
patent: 6061449 (2000-05-01), Candelore et al.
patent: 6523118 (2003-02-01), Buer
patent: 6539092 (2003-03-01), Kocher
patent: 7310706 (2007-12-01), Stribaek et al.
patent: 7360252 (2008-04-01), Torrubia-Saez
patent: 7599491 (2009-10-01), Lambert
patent: 2004/0062391 (2004-04-01), Tsunoo
patent: 2005/0084098 (2005-04-01), Brickell
patent: 2004-120307 (2004-04-01), None
Y. Tsunoo, E. Tsujihara, K. Minematsu, and H. Miyauchi, “Cryptanalysis of Block Ciphers Implemented on Computers with Cache”, International Symposium on Information Theory and Its Applications (ISITA), Oct. 2002.
Toyohiro Tsurumaru et al., “Timing Attacks on 64-bit Block Ciphers”, The 2003 Symposium on Cryptography and Information Security (SCIS2003), 2003.
D. Page, “Defending Against Cache-Based Side-Channel Attacks”, Information Security Technical Report, Vol. 8, No. 1, pp. 30-44, 2003.
Toyohiro Tsurumaru et al., “Timing Attacks on 64-bit Block Ciphers”, The 2003 Symposium on Cryptography and Information Security (SCIS2003), 2003. (English translation).
Nonaka Masao
Ohmori Motoji
Yokota Kaoru
Branske Hilary
Panasonic Corporation
Shiferaw Eleni
Wenderoth , Lind & Ponack, L.L.P.
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