Presentation	2013-05-23 Using KCV with CTR Mode and CENC Kazuma IKI, Tetsu IWATA,
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Abstract(in English)	CTR is a standard encryption mode and CENC is an encryption mode that has higher security than CTR. ANSI specifies partial information of the secret key called KCV (Key Check Value). This value is used to verify the validity of the key shared between the sender and the receiver. This paper analyzes the security of CTR and CENC when they are used with KCV. We first show that CTR is not secure when it is used with KCV. We next show that CTR remains secure if it does not take as input a nonce value that consists of 0 bits. We finally show that CENC maintains high security of the original CENC even when it is used with KCV.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	CTR / CENC / Key Check Value / provable security
Paper #	ISEC2013-1
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Conference Information
Committee	ISEC
Conference Date	2013/5/16(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)	Using KCV with CTR Mode and CENC
Sub Title (in English)
Keyword(1)	CTR
Keyword(2)	CENC
Keyword(3)	Key Check Value
Keyword(4)	provable security
1st Author's Name	Kazuma IKI
1st Author's Affiliation	Dept. of Computational Science and Engineering, Nagoya University()
2nd Author's Name	Tetsu IWATA
2nd Author's Affiliation	Dept. of Computational Science and Engineering, Nagoya University
Date	2013-05-23
Paper #	ISEC2013-1
Volume (vol)	vol.113
Number (no)	53
Page	pp.pp.-
#Pages	8
Date of Issue