link-layer encryptors for Ethernet?

[Anne & Lynn Wheeler]

the internal network was larger than the arpanet/internet just about the 
whole time up until about mid-85. all the links leaving physical premise 
had to be encrypted ... there was the claim that over half of all 
encrypters in the world were on the internal network (and put at least 
one of the major products/companies into business). lots of random 
comments about about the internal network
http://www.garlic.com/~lynn/subtopic.html#internalnet

small sample posting about the internal net passing 1000 nodes not long 
after internet passed 255 nodes.
http://www.garlic.com/~lynn/internet.htm#22

one of the big issues in part of this period was getting encrypters on 
links that cross national boundaries.

Joseph Tardo wrote:
> DEC used to make one (the DESNC), I don't remember the Xerox product. 
> Cylink used to make one, and may even still (as Safe-Net).
> 
> FWIW, IEEE has working group 802.1ae doing Ethernet MAC layer 
> encryption. But then, they had 802.10 (only implementation I know of was 
> the DESNC) for many years before retiring it.
> 
> The market for these kinds of devices has been notoriously small. May I 
> ask what your use case is?


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