The title had to be shortened, was:<p><pre><code> Romantic Cryptography, i.e. how to say "I love you" but only if the other person is going to say "me too"
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.. and sorry for the direct PDF link.<p>now i found out that the article was published in the Journal of Craptology:<p><pre><code> http://www.anagram.com/jcrap/Volume_7/</code></pre>