kk downing wrote:

>I am having some trouble digesting Cisco's
>authentication choices for VPNs. They list the
>following options:
>
>1)Authentication method RSA signatures (Rsa-sig)
>2)RSA encrypted nonces (Rsa-encr)
>3)Pre-shared keys (Pre-share)
>
>
>Choices two and three make sense to me but how does
>just plain RSA signatures work? Surely you have to
>pass a nonce or some other random data signed with
>your RSA key to authenticate. Is this just poor
>documentation or is there something I am missing?
>Thanks
>KK
>
I wrote a summary of my understanding at:
http://www.jmu.edu/computing/security/vpnauth.shtml



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