Several technologies important to NGI applications have their own specific security issues. For example, multicast is crucial to collaborative and distributed applications but has its own security concerns. Many different research efforts are underway to provide security in multicast but no general solution has been found. Security models differ among the proposed solutions - whether the need is to protect the multicast data, to protect the ability to form and join multicast groups or both. Research and experience is needed in effective security solutions for multicast communications.
Firewalls are another important security technology with specific security issues.
In networks operating at speeds 100 to 1000 times faster than today's, the performance demands on firewall protection will be daunting. Complex networks require remote network management tools, but the ability to manage a network remotely requires increased protection of the management of network devices and behavior. Non-hierarchical relationships among organizations in collaborative efforts are not wholly supported by the existing protocols. Flexible authorization structures are needed in the network management protocols. Security management and network management must be integrated to provide system wide security.