From mboxrd@z Thu Jan  1 00:00:00 1970
Message-Id: <200006151851.OAA26985@cse.psu.edu>
Subject: [9fans] Redistribution
From: "rob pike" <rob@plan9.bell-labs.com>
Date: Thu, 15 Jun 2000 14:51:35 -0400
To: 9fans@cse.psu.edu
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Several people have asked about how the license affects their ability
to make the sources available on their own sites, such as through
cross-referencing services or as archives on non-Plan 9 systems
that present the source for browsing.

I talked to our lawyers to make sure I understood the rules, and I did.

The rules are simple:

	1. Everyone who sees the material provided by the service must
	have agreed to the terms of the license. The simplest way to do
	this is, as we did in the distribution, is to require people to click a
	check box agreeing to the license. The license should be made
	available to users so they can read it before clicking.

	2. The export restrictions on cryptography are nasty to implement.
	We worked quite hard to do reverse DNS and all that stuff to
	determine the country of origin - and you need to do a lot more
	than that to meet the U.S. Commerce department requirements.
	The easiest way to deal with the issue is to avoid presenting the
	cryptographic code, and that's why I recommend.
	If all your users are known to you, that is, if you don't have outside
	visitors to your site, this is not an issue for American sites.

	Reiterating, if you make the crypto sources available to outsiders
	without these restrictions in place, you are violating Federal law.
	To avoid this, just don't make the crypto sources available, but
	require people to get them from us.

-rob