Re: Cipher choice for network packet payloads

From: Roger Schlafly (rogersc@mindspring.com)
Date: 04/14/03 

From: "Roger Schlafly" <rogersc@mindspring.com>
Date: Mon, 14 Apr 2003 17:35:30 GMT

"theKid" <cmlambert@hotmail.com> wrote
> After reading various messages on this group, I'm still unsure whether
> to use a block cipher or a stream cipher for encrypting 56 bytes of
> data per packet. The data is in no specific format, so there's no
> problem using a block cipher in OFB mode.

You could use either.

> Will a stream cipher (Blowfish OFB mode) be faster at encryption than
> a 64 bit block cipher (Blowfish)? Anything else that's worth
> considering?

No, but either is likely to be plenty fast. Blowfish and OFB are
declining in popularity, so I don't know why you want to choose those.

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