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→Explanation of U.S. patent expiration: hedge and clarify: some of the sources still use the 2010 date; it's the 2012 date I want to throw out |
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== TODO list (now done!) ==▼
== patents ==▼
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 ==
== Patent expiration date ==
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:US Patent: 5,214,703[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5214703.PN.&OS=PN/5214703&RS=PN/5214703] expiry date 25.05.2010
:Europe Patent: EP0482154[http://ep.espacenet.com/publicationDetails/biblio?DB=ep.espacenet.com&adjacent=true&locale=en_EP&FT=D&date=19920429&CC=EP&NR=0482154A1&KC=A1] expiry date 16.05.2011
:Japan Patent: JP322544B2 (''sic'', should beJP322544<u>0</u>B2) expiry date 16.05.2011
<s>This is consistent with my read of the two patent docs with links above</s> (I am a U.S. patent lawyer, but my OR is just as O). ''Edit: See below; the patent expired May 16, 2011 in the U.S., too.'' [[User:TJRC|TJRC]] ([[User talk:TJRC|talk]]) 23:29, 5 July 2011 (UTC)
:Some additional sources:
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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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I know this is kind of muddy, but I hope it cuts through some of the confusion in the discussion above, and the 2012 date does not apply. Although some of the sources say 2010 (erroneously) it's clearly not 2012. [[User:TJRC|TJRC]] ([[User talk:TJRC|talk]]) 00:00, 7 July 2011 (UTC)
:The overwhelming majority of all people reading this article will do it from a very practical perspective: They want to know after what date IDEA can safely be used without the fear of patent infringement. They don't read it for theoretical purposes about what interactions of what laws might cause exceptions. And from this perspective, the article states (correctly, it may be added) that IDEA is safe to use after January 7, 2012: it is "expiring not later than January 7, 2012". It doesn't deny it may be legal to use it before that date, but this question has not been discussed before except for what has been written above. The article acknowledges that "expiry [may take place] as early as May 16, 2011", but, as you admit yourself, this "constitutes original research". You present a complex and long analysis above to support this claim. Such analyses are sometimes wrong (in less obvious places)—without any bad intent. The world is a complicated thing. Even for a U.S. patent attorney. ;) I hope we can agree that the article presents the situation in a fair manner. Repeating your arguments in the article, in addition to what is said already, would give it undue weight. --[[User:Rtc|rtc]] ([[User talk:Rtc|talk]]) 17:31, 6 August 2011 (UTC)
Given that it is now after Jan 7, 2012, is it safe to say that under any interpretation, the IDEA patent has now expired in the US? [[User:Riordanmr|Riordanmr]] ([[User talk:Riordanmr|talk]]) 18:58, 16 February 2012 (UTC)
== Patent Situation in 2012 ==
As others have noted, this article really needs to update the current patent situation. It's quite certain that the US patent has expired, but I hope someone is able to find a good source for the other patents granted.
[[User:MMcCallister|MMcCallister]] ([[User talk:MMcCallister|talk]]) 16:30, 23 August 2012 (UTC)
== External links modified ==
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