On 2015-03-30 11:24, Giles Orr wrote:
> I'd like to keep an SSH key on a USB stick rather than storing it
> locally on every machine I want to use the key on.  The theory is that
> this is "more secure" for laptops that could be stolen or lost, or
> used by others (ie. at work). 
At first I would use strong enough passwords for my keys to avoid simple re-use by third parties.
If you really need to use the same key on multiple platforms I would either
a) use separate partitions for Windows, Linux, Mac. Pros: native support for each platform, Cons: need to sync keys every time you change them.
b) use portable Putty installation for each of the platform, just keep three binaries on a stick. Pros: mobile and independent. Cons: limited to a single app.


> The problem is that when I run "ssh-add
> /media/stick/my_dsa"
DSA ? I'd consider switching to RSA at least or ECDSA family.


--
Tim