[gentoo-user] Copying a file via ssh with no password, keeping the system safe

[Momesso Andrea]

Hi list,

I need to set up a cron job to transfer a file every day from server A  
to server B.

I'd like to do that via ssh and with no user assistance, completely automated.

Setting up a public key, would do the job, but then, all the  
connections between the servers would be passwordless, so if server A  
gets compromised, also server B is screwed.

Is there a way to allow only one single command from a single cronjob  
to operate passwordless, while keeping all the other connections  
secured by a password?

Thank you in advance for your help.

TopperH
http://topperh.ath.cx

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