Suchergebnisse

Wireless sensor network is widely used around us, which makes a great contribution to our daily life. In order to use such peculiar network well, security aspect should be taken into consideration, especially in some vital areas such as military field. Code image dissemination is one of the most important functions in wireless sensor network, so ensuring the security of this process is profound. Thus, in this paper, we first introduce the basic concepts of wireless sensor network and its security issue in code image dissemination. Threats and vulnerabilities of code image dissemination are pointed out to illustrate why attentions should be paid to this process. Then we describe the major code image dissemination protocols. These protocols are often used to disseminate code image in wireless sensor network, and they contain some common techniques. Thus, according to these features, we give the six most important techniques used in this area and illustrate how to use these methods to prevent the network from attacks. Moreover, we also give some open research issues in this direction, which could act as a guide for the latter scholars.