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| Subject: | Re: WELCOME to secureshell@securityfocus.com |
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| Date: | Fri, 19 Aug 2005 15:05:29 -0500 |
Greetings everyone. I have a question about ssh rekeying that Ihaven't been able to find much discussion about: Are there anysecurity disadvantages or risks with extremely frequent rekeying? I know there is a risk of collisions if you don't rekey frequentlyenough, but is rekeying every 1 minute or even more frequently bad? My guess would be that is is not bad, but I wonder if having that manysession keys generated would increase the risk of a collision in thesame way that having too many packets sent between rekeying does. Ifthis risk of collisions was true, does that mean that changingpublic/private key pairs would reduce this risk, or would one have tochange the server's keys as well? One note: I am not concerned with the computational or networkoverhead of very frequent rekeying – just the security implications. Thanks :)Eric
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