An information processor receives at a communication section thereof an encrypted content decryption key generated by encrypting, by a distribution encryption key, a content decryption key for decryption of a content encrypted by a content encryption key. The physical sector is comprised of plural sync codes. The composition and method reduce amounts of chlorine and an amount of labor associated with the cleaning, sanitization and maintenance of contained bodies of water. The disclosed invention provides a snowboard that has only partial metal or hardened edges along its perimeter to allow the rider to slide or grind on a rail without worry of catching a hardened or metal edge on the rail, or damaging the hardened or metal edge during the grinding activity.