On 2 Mar 2013, at 18:30, Benjamin Kaduk <kaduk@MIT.EDU> wrote: > I'm in a similar position as jhutz; I think I understand what the callback= protection mechanism should look like, and it doesn't involve protocol leve= l changes outside of SetCallBackKey. When a server receives a SetCallbackKey RPC, which set of callbacks does tha= t RPC apply to? S.=