Assume we need to do a type of digital signature such as ECDSA with sensors used in sensor networks. So, is there a secure and possible approach to store the keys in these sensors?
For example, is it possible to integrate a secure element with these sensors to perform securely digital signature? Or maybe there is a better approach to do this?
Meanwhile, do we have energy problem for generating signatures? (Regarding to energy limitation of sensors.)
In general, is it logical to generate signatures with sensors? (Assume we need signing messages by sensors, because of security issues.)