1997-12-22 - Re: Question on CFB variant with c[i-N]
Header Data
From: “Jim Russell” <jrussell@syndata.com>
To: <cypherpunks@Algebra.COM>
Message Hash: 09db2a5f3c6484b408acddaccea8d55eb85db978047e5ba91cc5fcdcaba60005
Message ID: <01bd0f14$9f141d20$8b73d6ce@Polaris.domain>
Reply To: N/A
UTC Datetime: 1997-12-22 20:28:24 UTC
Raw Date: Tue, 23 Dec 1997 04:28:24 +0800
Raw message
From: "Jim Russell" <jrussell@syndata.com>
Date: Tue, 23 Dec 1997 04:28:24 +0800
To: <cypherpunks@Algebra.COM>
Subject: Re: Question on CFB variant with c[i-N]
Message-ID: <01bd0f14$9f141d20$8b73d6ce@Polaris.domain>
MIME-Version: 1.0
Content-Type: text/plain
>>> cfb Ciphertext feeback mode
>>> c[i] = f1(K, c[i-1]) ^ p[i]
>>> p[i] = f1(K, c[i-1]) ^ c[i]
>Suppose instead of c[i-1] you use c[i-N] where N is say 10.
Wouldn't the size of your IV have to grow as N grows?
Jim Russell
SynData Technologies
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1997-12-22 (Tue, 23 Dec 1997 04:28:24 +0800) - Re: Question on CFB variant with c[i-N] - “Jim Russell” <jrussell@syndata.com>