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Re: Pubkey

from [Alexander Klimov] Network Security [Permanent Link]
Subject: Re: Pubkey
Date: Sun, 28 Nov 2004 19:08:41 +0200 (IST) 
On Sun, 28 Nov 2004, Harald Nesland wrote:

Alexander Klimov wrote:

I think a better way is as follows:
 -- Kate creates a key pair and sends pubkey to Admin
 -- Admin verifies that it is Kate, who sends it, creates an account and 
adds
    the pubkey to authorized_keys
 -- Kate now is able to login using her private key and has no password at 
all
    (that is good since it is now impossible to guess her password)


The private key ofcourse has to be stored safely. Note that any
compromise of a system containing these private keys can lead to a chain
of compromises.


Well, private key has to be encrypted with password and probably stored on
removable media. Of course, it does not help if some keylogger (and a program to
copy private key file) is installed by the intruder, OTOH it seams that in this
attack scenario only some additional "device" can save you (e.g., SecureID or a
printed list of one time passwords).

-- 
Regards,
ASK
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