Talk:Playfair cipher: Difference between revisions
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(added a couple of REXX examples that handle multiple Xes in the plain text.) |
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════════════════Playfair encryption──► decryption──► encryption worked. |
════════════════Playfair encryption──► decryption──► encryption worked. |
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</pre> |
</pre> |
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::Of course this kind of thing is doable. But it's also unspecified behavior. I adopted something which I felt was closer to the spirit of the spec, for the J implementation, mangling some repeated X's in the process. Here's how that looks using your test cases: |
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::<lang J> choose 'IJ' |
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setkey 'playfirexm' |
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encrypt 'I like XXX better than XX beer.' |
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RPBTXMGWDIWIXEZBLOGWDIXE |
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decrypt encrypt 'I like XXX better than XX beer.' |
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ILIKEXXQBETXERTHANXQBEER |
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encrypt 'triple xxx is like, thirty, dude. No XXXX though. Bummer.' |
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UIBIARGWMRNFBTIVBMIUAGVCROQEGWIWDSWCBCZRIXEM |
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decrypt encrypt 'triple xxx is like, thirty, dude. No XXXX though. Bummer.' |
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TRIPLEXQXISLIKETHIRTYDUDENOXXQXTHOUGHBUMMERX</lang> |
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