Back when Macs were black and white, there was a disk locking/encryption program. It wasn't a Norton product. I remember using Norton to rewrite a new boot sector and use norton unerase to get a lot of data off the hard drive (not the best protection) 
It was a driver-level product, and also had a control-panel and app for configuration.
It would be great if anyone knew the name -- approx. 1992 when I used it.
Cheers!
I have Mac Bible Ed. 2 and 3 at home, it may be listed there. Unfortunately, I'm at the college library, so I'll see what I can dig up tonight, okay?
And you don't mean the previous version of Apple File Security ? ie. was it an Apple product ?
MacSafe, maybe?
All I know was it was legit 3rd party product, not closely associated with Apple/Claris at all.
It was SERIOUS security software, right down to driver-level encryption, and password protection. It may have been called LockMac? but I don't think it was... It was on one 800KB floppy I believe (perhaps two).
dang, my memory is not what it once was!
LockOUT ? or LockVol ?
Both are control panel / extension / app suites, but I can't tell if they do everything you are thinking of.
Was it "MacTools"? This was a commercial software back then, it offered disk backups and encryption etc.
[Edit] Perhaps "Disklock"? - looking at product names in a 1994 MacFormat here (the closest I can get to your time frame for this software) Disklock 2.1 was a 130 (Pounds Sterling) product, BTW.
MacSafe featured a virtual "safe" you put files in, with password protection. But I really don't think its what you're looking for.
It may have been DiskLock, but it was at least 8 years before Nortons bought it.
Wow, Fifth Generation Systems, who wrote DiskLock, also wrote Pyro!, Suitcase and Super Laser Spool... WOW! these guys were groundbreaking when it came to software for the Mac.
EDIT: Yup, it was called FileGuard, a part of DiskLock (but may have been available separately?)
Thanks for all your help, I believe it was FileGuard 3.1 or something similar, a fairly high version number, and anything created before installing, was easily accessible with Norton Utilities, and all temporary MS Word docs were easily retrievable!.
NOTE: Found this on a patent site:
"Advanced Security, Disklock, FileGuard", Advanced Gravis Computer Technology, Bellingham, WA, Advertisement, 2 pages.
So before Fifth Generation Systems purchased DiskLock! That is old Mac software!
I will be uploading the disk image tonight!
Cheers.
Ah yeah, FileGuard, which my elementary school installed on the teachers' computer in the Mac lab after I got around "At Ease" with ease... Then I added my own name into the Administrators users list on the one machine with FileGuard. It's pretty darn secure, but "the human element" will always be the weakness in computer security. 
BTW, this was in ~1995 or so.
And yes, it allows putting a password on the hard disk driver. HOWEVER, you can just overwrite the driver with a new fresh driver from FWB Toolkit or similar software, or perhaps even a Mac OS install disk.
@amatecha - yeah, you get an error with Nortons Utilities, and it even asks if you want to put a new hdd driver on the disk - that solves that issue! The Norton's UnErase was even more helpful, because this computer was at a university, and it was against policy to install any third-party security software on university computers... It yielded documents that condemned the president of the student union, and he was rolled at a specially called public meeting. Take THAT FileGuard!
