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You can find the latest LED specifications, implementations and test vectors (hardware implementations are available on demand).
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Updated version of the LED block cipher. Available on ePrint  512k v. 2 Oct 25, 2012, 11:24 AM Thomas Peyrin
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The full version of the CHES 2011 article       537k v. 5 Oct 27, 2011, 12:21 AM Thomas Peyrin
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The optimized implementation for the updated version of LED  24k v. 4 Jan 16, 2014, 10:22 AM Jian Guo
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Reference implementation of the updated version of LED, with test vectors.  4k v. 2 Jul 18, 2014, 4:56 AM Jian Guo