Something

PASSWD_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

class PasswordGenerator

  def PasswordGenerator.generate(length=16)
    pwd = ""
    length.times do pwd << PASSWD_CHARS[rand(PASSWD_CHARS.size)] end
    pwd
  end

end