# File lib/tour/facets/string/crypt.rb, line 8
  def crypt(salt=nil)
    salt ||= (
      (rand(26) + (rand(2) == 0 ? 65 : 97) ).chr +
      (rand(26) + (rand(2) == 0 ? 65 : 97) ).chr
    )
    _crypt(salt)
  end