I'm setting up a retro Windows NT 4.0 system and have been trying to locate the SP6a high-encryption package for Intel x86, often associated with filenames such as SP6128I.EXE or SP6A386.EXE. The regular SP6a package, SP6386i.exe, is easy to find, but I'm unsure which file is actually the 128-bit release. Does anyone know the correct filename or a reliable archive containing it?
2 Answers
If you still need a copy, try searching preserved Microsoft download pages and established legacy-software archives. The archived page for the x86 high-encryption release may help confirm the correct filename and package details.
The filename may be causing the confusion. Microsoft’s archived download description identifies this as the SP6a High Encryption 128-bit version for Intel x86. Files named sp6i386.exe or sp6a386.exe are often the relevant packages, and they’re available in several software archives. You can verify the contents by checking whether they include rsaenh.dll; the basic 40/56-bit versions generally only contain rsabase.dll.
That clears it up. The package I found is named sp6a386.exe, and it includes rsaenh.dll as well as rsabase.dll, so it appears to be the high-encryption version. Thanks!