Re: depleting the random number generator -- repeated state

[Eugene Leitl]

David Honig writes:

 > One of the many uses of nitric acid.  Ie, take random samples

I thought this is mostly done by removing the bulk of the package
polymer by grinding, and then subjecting the rest of it to a plasma
etch.

I haven't put a processed wafer into nitric acid yet, but I could
imagine it does horrible things to small structures.

 > apart and look at them.  There are commercial places that
 > will do the lab work for you.

Since this involved manual work and heavy apparatus (UHV plasma etch
chamber, EM, etc.) as well as know-how (finding a structure and
guessing what it does) it won't be exactly cheap.