4 ms·
Don't forget that IBM actually designed Lucifer which was 128bits but it was the (edit:s/NSA/NHIS) that truncated it to 56bits and named it DES. So maybe this
by Nikker 14y ago
Don't forget that IBM actually designed Lucifer which was 128bits but it was the (edit:s/NSA/NHIS) that truncated it to 56bits and named it DES. So maybe this is an example of "6 of one or half a dozen of the other"?
- tptacek 14y agoAnd don't forget that Eli Biham smote Lucifer with differential cryptanalysis, found more than half of the keys insecure, reduced its security to 235, and published a journal article concluding that NSA strengthened the cipher design; DES was better than Lucifer.
- Nikker 14y agoMaybe 3 decades after it was released according to this paper; http://scholar.google.ca/scholar_url?hl=en&q=http://59.127.136.65/crypto/biham.pdf&sa=X&scisig=AAGBfm2hvYp0XLUMppevbSUagUxH60-pPw&oi=scholarr&ei=aYJkUOCbAof50gG5-ICwDA&ved=0CBsQgAMoADAA http://scholar.google.ca/scholar_url?hl=en&q=http://59.1... Even if the NSA appointed S-Boxes did improve Lucifer then decreasing the block size does not really improve on your point.
- tptacek 14y agoYou're not arguing with me; you're arguing with Eli Biham. He addressed the question you asked head on.