 Card sharing has established itself as popular method of pirate decryption.Much of the development of card sharing hardware and software has taken place in Europe, where national boundaries mean that home users are able to receive satellite television signals from many countries but are unable to legally subscribe to them due to licensing restrictions on broadcasters.Because the length of the complete control word is so small (64 bits), delivery of the control words to many different clients is easily possible on a home internet connection.