SSH authentication: a basic overview

Thursday, 12 August 2004, 8:46 AM EST

SSH is one of the premier Security tools in use today. SSH is most commonly used to gain a remote shell, but it can be used for file transfers, to display remote X applications on a local machine, and even to securely connect to services that lack encryption. Unfortunately, many who use it from day to day don’t have a good understanding of how it actually works. Many people know that SSH1 is deprecated, and that SSH2 has taken its place, but how many know how authentication actually works for both? I didn’t, and that bothered me, so I set out to do some research.

At New Order.

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