ABSTRACT
When we consider the use of the Internet and computer distribution rate, we expect that wired and wireless IP multicast will be widely used soon. If it is developed and the use of it is high, an attacker will be increased in proportion to this. To solving this problem, we need the transmission after encrypting the multicast data transmitted by key and the stability in process of group joining. Therefore, a key using is an essential method for secure handling. But, key generation and management are very complex and difficult part in wired and wireless multicast environment. Also, the data loss owing to key process is the frequent problem. In this paper, we improved the existing problem through applying concentration/distribution concept about the existing key generation and management method.
