(According to Applied Cryptography, IDEA is free for non-comercial
use. As the source code is being distributed via cvs anyway, I
can't see a reason why it isn't being included in any of the
branches.)
I was under the impression it was restricted (patented) in the US and in
some parts of europe - not having a clearer idea about where it was safe
to use, I thought it better not to include it at all. If you can point me
to something which explains where it's restricted and not, and under what
terms, I'd be most appreciative :)
AFAIK it is patented, but they alow use it in a non commercial
setting. Applied Cryptography says:
IDEA is patented in Europe and the United States [1012,1013].
The patent is held by Ascom-Tech AG. No license fee is
required for non-commercial use. Commercial users interested
in licensing the algorithm should contach Ascom Systec AG,
Dept CMVV, Gewerbepark, CH-5506, M\"agenwill, Switzerlans;
+41 64 56 83; Fax: +41 64 56 59 90; [EMAIL PROTECTED]
The references are to International Patent PCT/CH91/00117, 28 Nov
1991 and US Patent #5,214,703, 25 May 1993. A quick web search
turned up http://www.massconfusion.com/ssh/ssh_patent_issues.html
which contains a letter from Ascom which states their position.
It looks like there should be no problem including the code
and compiling it conditionally (it cites PGP as a valid piece of
free usage, for example).
David.
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