  Several years ago, wireless sensor networks were used only by the military.
These networks, which have many uses and are subject to limitations, the most
important of which is the energy constraint, this energy constraint creates the
requirement that the number And the length of the messages exchanged between
the sensors is low. Sensor networks do not have a stable topology due to their
inaccessible environments, and continually changes with the disappearance or
addition of a node, support for the topology is performed in three steps before
deployment, after deployment and deployment. . The sensor nodes are scattered
across the field and transmitted by a multidimensional connection to the sink.
The communication protocol of the sensor networks used by all nodes in the
network and sink. The protocol consists of five layers and three levels of
management. Sensor networks require a kind of security mechanism due to
inaccessibility and protection. Conventional security mechanisms are
inefficient due to the inherent limitations of sensor nodes in these networks.
Sensor nodes, due to energy and resource constraints, require security
requirements such as the confidentiality of data integrity data,
authentication, synchronization, etc. Currently, many organizations use
wireless sensor networks for purposes such as air, Pollution, Traffic Control
and Healthcare Security is the main concern of wireless sensor networks. In
this article, I will focus on the types of security attacks and their
detection. This article outlines security needs and security attacks in
wireless sensor networks. Also, the security criteria in wireless sensor
networks are mentioned.
