I thing you are talking about data mining, big data analytics etc. But still not clear with security device in agriculture. Could you please explain it in a detailed way?

 I agree, please clarify the question. Do you mean security as in security cameras that protect the crops? Or are we talking about securing the IoT devices themselves, or the authenticity of the data they produce?

http://www.ey.com/Publication/vwLUAssets/EY-cybersecurity-and-the-internet-of-things/$FILE/EY-cybersecurity-and-the-internet-of-things.pdf