The Internet of thing (IoT) is a growing concept for smart cities, and it compulsory to communicate data between different networks devices. In the IoT, communication should be rapid with less delay overhead. For this purpose, flooding used reliable in cities but at cost higher overhead, energy consumption packet drop etc. This paper aims increase efficiency term overhead reliability by using m...

This paper focuses on the way to protect privacy of clients requesting datasets stored in data servers while keeping communication efficiency. To this end, we introduce a novel communication-efficient and protecting framework termed crowded information acquisition (CIA) , well suited large numb...

Streaming high quality videos consumes a significant amount of network resources. Researchers proposed prefix caching schemes to reduce bandwidth usage costs in streaming videos. In this paper, we introduce a wide-scale cost model for proxy caching that takes bandwidth consumption into consideration over an entire network for different multicasting tree topologies. The new cost model quantifies...

A key tree is a distributed data structure of security keys that can be used by a group of users. In this paper, we describe how any user in the group can use the different keys in the key tree to securely multicast data to different subgroups within the group. The cost of securely multicasting data to a subgroup whose users are “consecutive” is O(log n) encryptions, where n is the total number...

Multicasting is a technique for data routing in networks that allows multiple destinations to be addressed simultaneously. The implementation of multicasting requires, however, the solution of difficult combinatorial optimization problems. In this chapter, we discuss combinatorial issues occurring in the implementation of multicast routing, including multicast tree construction, minimization of...