Just a bit of fun...

sooper_seekret_encreepshun.rb

require 'base64'
class Object
  def e64 str
    Base64.encode64(str).chomp
  end
  def d64 str
    Base64.decode64 str
  end
  def rot13 str
    rotN(13,str)
  end
  def rotN n, str
    n %= 26
    replace = ('A'.ord + n).chr + "-ZA-" + ('A'.ord + n - 1).chr
    replace += replace.downcase
    str.tr("A-Za-z", replace)
  end
  def i36 str
    str.split(/\s+/).collect { |s| s.to_i(36) }.join(' ')
  end
  def s36 str
    str.split(' ').collect { |t| t.to_i.to_s(36) }.join(' ')
  end
end

"===== BEGIN HERE ====="
e64 "===== BEGIN HERE ====="
rot13 "===== BEGIN HERE ====="
i36 "===== BEGIN HERE ====="