[buescher]

They make ‘em for secure key storage. The kind of drm scheme you’re describing, though, is not going to be too challenging for someone to subvert who’s already willing to use any of a number of methods to have firmware read off a protected chip.

[R0b0t1]

It's not DRM but serial or secret registry. It allows you to voluntarily check the product you've received against a known list of vendor produced products to allow you to detect a counterfeit.

With the customer as a willing participant such things are hard to subvert.