The security goals are categorized as two main part:
2.1.1 Primary security goals:
There are three types of major security goal, Confidentiality, integrity, and data availability as shown in the figure 2.
Figure1 Major Security goal
2.1.1.1 Confidentiality:
Data confidentiality is the most important issue in network security,its increase the secrecy of the data transmission and this data is more trusted than that of the leaked data. Hence, it is important to establish the secure paths between nodes and hide information from un authorized users. [10]
2.1.1.2 Data Integrity:
With the implementation of confidentiality, an enemy may be unable to attack information. throuth, this doesn’t mean the data is secure . The enemy can change the data. For example, a malicious node may add some flags within a packet. This mean that new packet sent to the receiver. [11]…show more content… And hence availability is a main constraint that guarantees the stability of network performance against Denial of Service attacks. [10]
2.1.2 Secondary Security Goals:
all data in the WSN should get optimum freshness , data freshness suggests that the data is fresh , and no old data was duplicate. To solve this problem the time stamp to packet and when receive packet we can find if the data is fresh or not. [12]
2.2 Attacks on WSN
Some of the attacks, classified on the basis of OSI reference model layers, are listed in table given below with their defense strategies. [4]
Table1 Attack’s in WSN
Layer Attacks Defense strategy
Physical layer Jamming Tampering Spread spectrum strategy MAC layer admission control
Data link layer Collusion Jamming Disruption MAC Spread spectrum Error correction techniques
Network layer Selective forwarding Hello
