Privacy Models in Wireless Sensor Networks: A Survey

Table 5

Network issues: management and trust.

	Network	Clusters/regions	Trusted issues	Working assumptions
[44]	Sensor-sink communication by flooding Routing bases on an initial beacon Each neighbour decides to accept/reject a packet using policy		Network is trusted for a period after deployment	Set of authentication-encryption protocols in use
[39]		x
[30]		x
[22]	Tree routing
[28]	No need for any specific topology Communication with server is anonymous		Sensors and sensor-sensor connectivity
[25]
[52]	The destination ID for each packet (i.e., the sink) is encrypted
[29]				Events follow a probability distribution; initiate on a random location of the WSN perimeter; eventually terminate within the network
[31]	Ring	x		Time is slotted, one event per slot
[21]		x
[34]
[20]				Key management exists
[49]				Random key distribution scheme (e.g., Gligor)
[53]				Mobile environment
[16]
[46]	Ring
[50]		x
[35]				Time is slotted, one event per slot
[54]	Sensors randomly scattered	x
[13]	WSN-suitable routing
[14]
[24]		x
[38]
[18]
[47]	Arbitrary topology
[48]			All components are trusted	Set of authentication-encryption protocols in use
[26]
[42]		x
[27]
[45]		x
[15]
[19]
[32]
[23]	Homogeneous distribution of nodes		Sink is trusted	Encrypted messages are sent periodically
[17]
[43]				Random key distribution scheme (e.g., Gligor)
[36]			Sink is trusted	To query a sensor data: need to be registered in the sink and have a smartcard
[33]			No TTPs. Law authority has limited trust
[37]				Key management exists
[40]
[41]