efficiency?? vs security with symmetric crypto? (Re: Tinc's response to "Linux's answer to MS-PPTP")

[Sandy Harris]

Adam Back wrote:

> What conceivable trade-offs could you have to make to get acceptable
> performance out of symmetric crypto encrypted+authenticated tunnel?
> All ciphers you should be using are like 50MB/sec on a 1Ghz machine!!
> 
There's fairly detailed performance data for Linux FreeS/WAN IPsec
http://www.freeswan.org/freeswan_trees/freeswan-2.02/doc/performance.html

It's around 50 M bit/second on a GHz machine with 3DES. You can
roughly double that with AES.

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