in Kerberos_V5_Development
Re: Comments/questions on library interface
Mon Dec 4 15:09:31 1989
Date: Tue, 28 Nov 89 13:50:34 EST
From: sommerfeld@APOLLO.COM (Bill Sommerfeld)
In-Reply-To: John T Kohl's message of Monday, November 27, 1989 11:42:56 am (EST)
Subject: Re: comments on header files.
> The encryption/decryption interface seems to assume a block cipher,
> not a (blocked-)stream cipher; I think the latter might be a better
> choice of interface.
The problem is that assumption of a stream cipher causes some problems;
assuming a block cipher is a more general case of a stream cipher (which
can be considered a block cipher with blocksize 1).
Yes, but do all stream ciphers built on block ciphers use a scheme
identical to CBC to merge together blocks? I don't think we can
depend on that.
Maybe we need "block cipher" encode/decode and "stream cipher"
encode/decode in the operations...