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On 05/15/2013 09:01 AM, Finn Wilcox wrote:
It's just a substitution cipher, i.e. each character is globally
replaced by another.  I don't have the .pdf, but I am guessing they
generate a random permutation of the codepoints used in the document and
embed a font whose glyphs have the same permutation applied.

They should've used a "stick figures" font! THEN It would've been worth it.