From: "Mikael Høilund" <mikael@...>
Date: 2008-05-19T13:18:11+09:00
Subject: Re: [QUIZ] Obfuscated Email

Just thought I'd throw another one out there:

a,b=%Q=Z,O^NPO\r4_PV\\PI\x15^-\x0\v=,email=%\%%%c\%115%%# Mikael  
Hoilund, CTO
okay=%#;hmm=(0...a.size).map{|i|((a[i]-email[i]+2)%128).# of Meta.io  
ApS from
chr}.join;!email.gsub!'o',"%c%c"%[3+?0.<<(2),?G.~@];aha=###########  
Denmark!!
hmm.scan /#{'(.)'*5}/;puts(email[1..-12]+aha.shift.zip(*aha).join)#  
Ruby rox!

Among the hacks are:

  * The first comment isn't a comment, but a %#...#-style string. It's  
used as a mask over `a`, by subtracting the sequential characters of  
the two strings, adding two, and modulo 128'ing.
  * The string `a` is the Caesar-square rotated plain-text email. `b`  
is a dummy, incidentally assigned the same string as `email`.
  * foo.<<(bar) instead of foo << bar, foo.~@ instead of ~foo
  * It re-uses the `email` string to print the name before the email  
address, cropping the ", CTO\nokay=".
  * It assumes UTF-8, and replaces the 'o' in `email` with "\303\270"  
for your viewing pleasure
  * It uses excessive punctuation in the comments to achieve equal  
line length. So sue me. :(

-- 
Mikael Hoilund, CTO
of Meta.io ApS from
######### Denmark!!