Re: How 2 secure PC-PC data transfer

Mac OS X is not based on BSD code at all; far from it. Mac OS X code is based on the Mach
operating system, created by Rick Rashid, who is currently VP for Research at Microsoft.
Rick's office was one floor up from mine when he was creating the first version of this at
CMU in the early 1980s.

Contrary to a large number of myths, Unix was never "free" source; it was "available"
source. I know this because I had to make the case to write a $40,000 check to AT&T to
get the source for a commercial site I was running in 1982. Which was a Good Move,
because the next year the cost went up to $100,000. BSD was more available, but had a
number of limitations based on the AT&T license; it wasn't until the FreeBSD project
produced a non-infringing version that it became freely available.

Mach was a rewrite from the ground up of a new operating system kernel which was *not*
anything like Unix (for example, it had preemptive multithreading). Then a thin interface
layer that emulated the Unix kernel interface was added to allow Unix apps to run. It
also had an interface that ran Mac apps, and a few others they played with. It was funded
by DARPA and was always freely available.

Note that Unix/linux is invulnerable to attack; like any Mac fanatic, Unix/linux advocates
have lost all grasp of reality (OTOH, the number of security updates coming out for these
operating systems and their various support programs, such as browsers, contradicts the
fanatics' rosy-glasses attitude). In fact, some of the most serious attacks have been on
Unix/linux systems; check the CERT advisories.
joe

On Sat, 03 Oct 2009 16:39:22 -0700, Geoff <geoff@xxxxxxxxxxxxxxx> wrote:

On Fri, 02 Oct 2009 11:03:18 -0400, Joseph M. Newcomer
<newcomer@xxxxxxxxxxxx> wrote:

linux! vulnerable! NO! Tell me it ain't so! That means that Unix, and Mac OS X would
also be vulnerable! And we know from TV ads that it is impossible to attack a Mac!

[Somehow, this glosses over the security fixes that regularly come out for Mac OS X and
Mac producs such as their Web browser, or the fact that the first antivirus I bought, back
in 1987, was for a Mac, because they were so vulnerable...]
joe


Not to mention the fact that the first "worm" on the Internet was a
Unix phenomenon, affecting VAX computers and SUN workstations running
BSD 4.2 and 4.3 code, the basis of Mac OS/X today. See: "The Morris
Worm" or "helminthiasis of the Internet", RFC-1135 December 1989.

Security is a methodology and a frame of mind.
Joseph M. Newcomer [MVP]
email: newcomer@xxxxxxxxxxxx
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm
.

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