Need code for JRE builds and JKernel to:
1) Avoid dependencies on most Java security classes
2) Generate secure hashcodes corresponding to each JKernel bundle for a resource
that will be used by JKernel during bundle downloads
3) Check downloaded bundles to see that they are not corrupt and that they contain
the same bits as in the bundles created by a given JRE build
See comments for additional details.