[Cryptography] CFB/OFB/CTR mode with HMAC for key stream
mitch at niftyegg.com
Mon May 1 17:45:00 EDT 2017
On Mon, May 1, 2017 at 2:35 PM, Tom Mitchell <mitch at niftyegg.com> wrote:
> On Mon, May 1, 2017 at 8:29 AM, Bill Frantz <frantz at pwpconsult.com> wrote:
>> On 5/1/17 at 12:07 AM, memvandal at gmail.com (Memory Vandal) wrote:
>>> I was wondering if using HMAC with something like SHA-256 to create a key
>>> stream in CFB/OFB/CTR mode is a bad idea.
Name space collisions may have made me look foolish. :-\
There is a bit of history in the WP page.
"The definition and analysis of the HMAC construction was first
published in 1996 by Mihir Bellare, Ran Canetti, and Hugo Krawczyk,
who also wrote RFC 2104. This paper also defined a variant called NMAC
that is rarely, if ever, used. FIPS PUB 198 generalizes and
standardizes the use of HMACs. HMAC-SHA1 and HMAC-MD5 are used within
the IPsec and TLS protocols."
T o m M i t c h e l l
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