SSH authentication bypass?

Tom Buskey tom at buskey.name
Thu Jun 26 16:09:25 EDT 2014


This is the article:
http://www.linuxjournal.com/node/8051/print



On Thu, Jun 26, 2014 at 4:07 PM, Tom Buskey <tom at buskey.name> wrote:

>
> On Thu, Jun 26, 2014 at 3:00 PM, Kevin D. Clark <kevin_d_clark at comcast.net
> > wrote:
>
>>
>> Mark Komarinski writes:
>>
>> > HPN SSH (patches to boost ssh performance) allows for no encryption
>> > of the data stream but IIRC the authentication is encrypted.  That
>> > doesn't bypass authentication so this may not be related
>>
>> The following statement is based on my experience with these patches:
>> I didn't notice much of a difference from these patches when I was
>> copying a certain {large-ish, constantly updating} file from a site on
>> the West Coast to a site in NH.
>>
>>
> There was a neat article in Linux Journal (?) that compared
> compression/decompression time, bandwidth, data compressibility and cpu
> speed.
>
> At the end, there was a 3d graph that showed the results.  If you have
> infinitely fast bandwidth, running compression is a waste.  If your CPU is
> infinitely fast, compression takes no time and should always be done.  I
> think you hit one of the areas where the speed of compression/decompression
> at either end matched the reduction in bandwidth usage from compressing
> your data.
>
> For example, if your data is compressible enough and you have a
> cpu/algorithm that is fast enough, you can effectively push more then 11.2
> MB/s through 100mb ethernet.  If your data is not compressible, the time of
> the compression will just slow things down.  Encryption usually includes
> compression too.
>
> There were a places on the graph where compression just increased the
> bandwidth.  And places where the bandwidth made even 1% compression
> significant.
>
>
>
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