Presentation	1998/9/17 Security of Block Ciphers with SPN-Structures Makoto Sugita,
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Abstract(in English)	The idea of the Locally Random Function(LRF) was presented by Maurer as a simplified treatment of the Pseudorandomness of Luby-Rackoff. We analyze the LRFness of the SPN-structure and E2-like transformations and show that this can be easily calculated by some matrix calculation, and clarify that the linear translation used in E2 offers a good pseudorandomness. Moreover, we examine the maximum average of the differential probability of the SPN-structure. We show that this can be calculated recursively by a simple calculation and confirm that the linear transformation used in E2 offers good pseudorandomness when used in the 4-round SPN-structure.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	E2 / SPN-structure / Locally random function / Maximum average of differential probability
Paper #	ISEC98-30
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Conference Information
Committee	ISEC
Conference Date	1998/9/17(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)	Security of Block Ciphers with SPN-Structures
Sub Title (in English)
Keyword(1)	E2
Keyword(2)	SPN-structure
Keyword(3)	Locally random function
Keyword(4)	Maximum average of differential probability
1st Author's Name	Makoto Sugita
1st Author's Affiliation	NTT Wireless Systems Laboratories()
Date	1998/9/17
Paper #	ISEC98-30
Volume (vol)	vol.98
Number (no)	268
Page	pp.pp.-
#Pages	8
Date of Issue