Pengamanan Internet of Things Berbasis NodeMCU Menggunakan Algoritma AES Pada Arsitektur Web Service REST

Data confidentiality and resource's limitation issues are challenges for the Internet of Things. To implement good security on IoT systems, cryptography can do it, but it needs an effective encryption algorithm that does not require a lot of resources. The purpose of this study is to secure an IoT system by implementing an algorithm that is successful in maintaining the confidentiality of data transmitted. This research uses an experimental approach, by creating an IoT system for agriculture and adding an encryption algorithm. The IoT system uses NodeMCU as a microcontroller. NodeMCU is a microcontroller with small resources so it needs an efficient algorithm to be implemented in it. One algorithm that has good performance in a desktop computing environment is the Advance Encryption Standard (AES) algorithm. The algorithm is tested in an IoT computing environment with a data exchange architecture using an REST (Representational State Transfer) web service, resulting in an IoT system for agriculture with cryptographic implementations in it. In the tests carried out, the encryption process of 128 and 256 bits of plain text took 266.31 and 274.31 microseconds, while the memory used was 16% and 17% of the total memory, respectively. This shows the encryption time is fast, and the memory usage is relatively small.Data confidentiality and resources limitation issues are challenges for Internet of Things. To implement good security on IoT systems, cryptography can be implemented, but it needs effective encryption algorithm that does not require a lot of resources. The purpose of this study is to implement an algorithm that is effective in maintaining the confidentiality of data transmitted on an IoT system with limited resources. This research uses experimental research methods, by creating an IoT system for agriculture and adding an encryption algorithm. The IoT system uses NodeMCU as a microcontroller. NodeMCU is a microcontroller with small resources so it needs an efficient algorithm to be implemented in it. One algorithm that has good performance in a desktop computing environment is the Advance Encryption Standard (AES) algorithm. The algorithm implemented in the IoT system using a REST (Representational State Transfer) web service. The result of this research is an secured IoT system for agriculture. In the tests carried out, the encryption process of 128 and 256 bit plain text took 266.31 and 274.31 microseconds, while the memory used was 16% and 17% of the total memory. This shows the encryption time is relatively fast and the memory usage is relatively small