I am wondering if each core in a multi-core processor with Intel Secure Key (Ivy Bridge and later) has its own entropy source? Or would, say, a quad-core chip have all four cores share a single entropy source?
In this case the best support should be provided by Intel® Developer Zone, this is the right place to get answers in regard to the Intel® Secure Key Technology. See here for the support page; What is Intel® Secure Key Technology? | Intel® Software, and the forums here; Platform and Technology Discussion.