For anything any of us (consumers of free backup products) are likely to 
do, anything stronger than original DES is probably fine.


If you want background info, 
http://www.security-forums.com/viewtopic.php?printertopic=1&t=6690&start=0&postdays=0&postorder=asc&vote=viewresult&sid=19654e84950fe8608fde7e4a951da0ee
 
has a good end-user perspective of some of the most common ciphers.

The take home is: avoid DES due to the short length of its key. 3DES is 
secure (30+ years of use), but slow. Blowfish has a good reputation for 
being fast, simple, and secure. If you're paranoid, think about AES, but 
remember the recent advisories concerning AES keys >= 128-bits.

Disclaimer: I am *not* a cryptographic expert; I just know how to use 
google. :-)

On Thu, 3 Sep 2009, Jeffrey J. Kosowsky wrote:

> Stephen Joyce wrote at about 10:31:44 -0400 on Thursday, September 3, 2009:
> > Have you tried ssh -c blowfish?
> >
> > 3des is the default cipher for most ssh implementations and blowfish is
> > much faster than 3des.
>
> Thanks - I wasn't aware of that.
> What (if any) are the downsides to using 'blowfish' vs 3DES?
>
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