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DAGSTUHL
2007

Tightness of the Security Bound of CENC

8 years 4 months ago
Tightness of the Security Bound of CENC
CENC (Cipher-based ENCryption) is the recently designed encryption mode for blockciphers. It is provably secure with beyond the birthday bound. In this note, we present a simple distinguishing attack on CENC, and show that the attack is the best attack for some parameter. This proves the tightness of the security bound, and gives a partial answer to the open question posed at FSE 2006. Key words: Encryption mode, blockcipher, CENC, provable security
Tetsu Iwata
Added 29 Oct 2010
Updated 29 Oct 2010
Type Conference
Year 2007
Where DAGSTUHL
Authors Tetsu Iwata
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