Link-layer protocols often provide some basic security mechanisms to guarantee authentication of the client connecting to a specific network, and encrypt data by using symmetric keys such as AES. In most cases, authentication at the link layer is sufficient to guarantee a basic level of security. Nevertheless, pre-shared, well-known keys often used in LR-WPAN network stacks may be vulnerable to multiple kinds of attacks, and using a pre-shared key would give an attacker the opportunity to decipher any traffic that has been previously captured on the same link.
A device that takes part in an IoT-distributed system is required to implement a higher grade of security, especially in embedded devices not protecting the ...
