Sang-Hyun Lee, Dong-Joon Chun, Design and Development of Encryption Key Management Control Module Using Elliptic Curve Theory, Journal of Engineering and Applied Sciences, Volume 13,Issue 5, 2018, Pages 1142-1147, ISSN 1816-949x, jeasci.2018.1142.1147, (https://makhillpublications.co/view-article.php?doi=jeasci.2018.1142.1147) Abstract: Recently, as the security problem for wireless internet environment has emerged, Elliptic Curve Crypto system (ECC) has emerged as a next generation cryptosystem that provides a solution to this problem. In this study, Simple Power Analysis (SPA) attack method which is one of the subchannel attacks is called public key-based password required for information security and authentication of smart home appliances included in smart grid system we design and develop a elliptic curve cryptosystem algorithm that can perform a given task independently. Keywords: ECC;SPA;public key;registers;accumulator;elliptic curve cryptosystem