Talk:Playfair cipher

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Talk:Playfair cipher/to do

Playfair cryptanalysis

The Playfair is thus significantly harder to break since straight frequency analysis doesn't work with it.

Well, that's simply not the case. Analysis of single letters doesn't work with Playfair, but if you do frequency analysis of digraphs it works ... well, not "fine" exactly, but it's the way to get results. True, there are roughly 600 of them (in English) as opposed to 26, and the distribution is flatter, but as written the article suggests that cryptanalysts faced with Playfair sit around scratching their heads, which I imagine they generally don't. --Calieber 15:31, 7 Oct 2003 (UTC)

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