Presentation	1996/7/22 Provable Security of DES-like Ciphers Depending on its Rounds Yasuyoshi KANEKO,
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Abstract(in English)	This paper gives a new result, about the provable security of DES-like ciphers. We derive formulas for an estimation which gives an upper bound to the key average differential probability and the key average linear probability. These formulas have these parameters : the number of round N and the muximum 1-round differential probability p (or the 1-round linear probability q). In case of 3-round and 4-round, these formulas give good agreement with the well known Nyberg's and Aoki's results. When the probability p and the probability q are less than 1/2 these formulas become decrease functions of the number of round N. So we can get the formulas which are more secure than old ones.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	Provable security / DES-like ciphers / N-round differential estimated formula / N-round linear estimated formula
Paper #	ISEC96-8
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Conference Information
Committee	ISEC
Conference Date	1996/7/22(1days)
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Paper Information
Registration To	Information Security (ISEC)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Provable Security of DES-like Ciphers Depending on its Rounds
Sub Title (in English)
Keyword(1)	Provable security
Keyword(2)	DES-like ciphers
Keyword(3)	N-round differential estimated formula
Keyword(4)	N-round linear estimated formula
1st Author's Name	Yasuyoshi KANEKO
1st Author's Affiliation	Yokohama Research Center, Telecommunications Advancement Organization of Japan()
Date	1996/7/22
Paper #	ISEC96-8
Volume (vol)	vol.96
Number (no)	167
Page	pp.pp.-
#Pages	11
Date of Issue