Hi,

I don't know for sure, but I believe it's a HMAC. For ASP.NET it seems the
HMAC key is a per-server secret (with hooks for syncronising this in a
cluster). I actually think that is a weakness and a per-session key would be
preferable.

Another thing to consider is cross-site request forgeries (CSRF). Ideally
the widgets forms would come with built-in protection.

At some point I am hoping to do a security audit of TG. Right now though, I
have other priorities, namely getting my app working! :-)

Paul



Indeed.  Any hints on how they implemented that?  We can use HMAC for the
crypto part, it is available at the standard library...


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