[RndTbl] sshd: Corrupted MAC on input.

Hartmut W Sager hwsager at marityme.net
Fri Jul 31 08:57:41 CDT 2020

Oops, *sorry Gilbert*, I looked at this thread again, and it was *your*
position on checksums that I'm supporting.  Maybe I have some bad/failing
Chinese capacitors in my head.  :)

Hartmut W Sager - Tel +1-204-339-8331

On Fri, 31 Jul 2020 at 08:44, Hartmut W Sager <hwsager at marityme.net> wrote:

> >> TCP checksums aren't perfect, and with very large transfers, there is
> >> a statistically significant probability of errors getting through,
> > I think they are 32-bit checksums in TCP?  Yes, between the
> lower layer checksums and TCP my gut says errors should be rare.  Maybe
> the math will spell differently though on really junky connections...
> However short of wireless, no one should really have that junky a
> connection anymore.
> If those "32-bit checksums" are truly just checksums, i.e., sums mod 2^32,
> then my math knowledge definitely agrees with Trevor.  A simple bit-flip of
> two bits in the same bit position throughout the entire file would cancel
> each other and go undetected.  And for a large file, that probability is
> very significant.  As for the unlikelihood of "really junky connections"
> nowadays, well, that's what checksums, CRCs, etc., are for, as a "just in
> case" the unlikely event does occur, in addition to the occurrence of the
> more likely events.
> Hartmut W Sager - Tel +1-204-339-8331
> On Fri, 31 Jul 2020 at 04:11, Trevor Cordes <trevor at tecnopolis.ca> wrote:
>> On 2020-07-30 Gilbert E. Detillieux wrote:
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://muug.ca/pipermail/roundtable/attachments/20200731/26c58873/attachment-0001.htm>

More information about the Roundtable mailing list