class Kramdown::Converter::Html

def obfuscate(text)

Obfuscate the +text+ by using HTML entities. 
def obfuscate(text)
  result = +''
  text.each_byte do |b|
    result << (b > 128 ? b.chr : sprintf("&#%03d;", b))
  end
  result.force_encoding(text.encoding)
  result
end