Don Y wrote:
  I'm not sure if this is too technical for
discussion
 here -- except for hysterical raisins...
 Are there any OS's that have implemented (non-trivial)
 signatures on loading executables as a scheme of protecting
 the operating environment?  I.e. something more than
 verifying the proper COFF/ELF/etc. load format... 
Grrr... sorry, I should qualify this:  I mean as it applies
to "general purpose" computing (NOT to "appliances").
Thanks!
--don