Setup Identical <machinekey /> Sections On Each Servers .config File?

Mar 2, 2010

We have a scenario using asp.net Forms Authentication in a web farm and need to setup identical <machinekey /> sections on each servers .config file.

Is it better to store the <machinekey /> section in machine.config rather then web.config? what's the advantages and disadvantages of each approach concerning security?

<machineKey validationKey="[keyhere]"
decryptionKey="[keyhere]" validation="SHA1" />

If its not secure enough, is there any way to encrypt <machinekey /> section like we encrypt our connectionsstring (with DPAPI)? (http://msdn.microsoft.com/en-us/library/ms998280.aspx)

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