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{{CryptographyReader}}
== patents ==▼
== TODO list (now done!) ==▼
The article says "IDEA is patented in Austria, France, Germany...". you cannot patent software (or any other algorithms) in germany.... <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/213.61.9.74|213.61.9.74]] ([[User talk:213.61.9.74|talk]]) January 26, 2011</span><!-- Template:Unsigned IP -->▼
{{todo}}▼
It's late and I'm tired, but this article lacks information on (a) the input/output transformation stage, and (b) the subkey generator. [[User:Raul654|→Raul654]] 03:19, Mar 21, 2004 (UTC)▼
: True, but they aren't very interesting... [[User:Matt Crypto|Matt]] 03:36, 21 Mar 2004 (UTC)▼
:: I'll add them to the to-do list anyway. [[User:Matt Crypto|— Matt]] 23:24, 27 Nov 2004 (UTC)▼
::: I have added an image showing the transformation round. [[User:Danielap48|danielap48]] 02:04, 19 Oct 2006 (UTC)▼
==Image format==
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The IDEA applet link does not appear too useful, not in English and I saw no way to run a simulation.--[[User:Billymac00|Billymac00]] ([[User talk:Billymac00|talk]]) 19:24, 4 January 2009 (UTC)
▲== patents ==
▲The article says "IDEA is patented in Austria, France, Germany...". you cannot patent software (or any other algorithms) in germany.... <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/213.61.9.74|213.61.9.74]] ([[User talk:213.61.9.74|talk]]) January 26, 2011</span><!-- Template:Unsigned IP -->
== Patent expiration date ==
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:Non-RS web sites, such as forums and blogs, are mixed, with many referring to a 2012 expiration, but I suspect they get their info from this article. [http://crypto.junod.info/2011/05/ One site] is express about that: "the European patent protecting the IDEA (International Data Encryption Algorithm) block cipher has expired a few days ago, on May 16th, 2011, and hence felt into the public ___domain. Note however that, according to its Wikipedia page, the cipher is still protected in the US until January 7th, 2012." [[User:TJRC|TJRC]] ([[User talk:TJRC|talk]]) 00:05, 6 July 2011 (UTC)
▲== TODO list (now done!) ==
▲{{todo}}
▲It's late and I'm tired, but this article lacks information on (a) the input/output transformation stage, and (b) the subkey generator. [[User:Raul654|→Raul654]] 03:19, Mar 21, 2004 (UTC)
▲: True, but they aren't very interesting... [[User:Matt Crypto|Matt]] 03:36, 21 Mar 2004 (UTC)
▲:: I'll add them to the to-do list anyway. [[User:Matt Crypto|— Matt]] 23:24, 27 Nov 2004 (UTC)
▲::: I have added an image showing the transformation round. [[User:Danielap48|danielap48]] 02:04, 19 Oct 2006 (UTC)
==Explanation of U.S. patent expiration==
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