The purpose of this study is to analyze: 1) What are the efforts made by the Indonesian government in protecting state secret information data and resistance to cyber war? 2) The country's defense strategy in facing information warfare in the digital era? 3) How are efforts to reconstruct the formation of a national cyber defense or cyber army in an effort to defend state sovereignty?. This research is a type of normative juridical research with a legislative approach, a conceptual approach, and a case study. The results of the study show that: 1) Related to efforts to ensure legal certainty in the development of cyber-security has been carried out, among others, by implementing a series of programs that have begun to run, including: initiating laws and regulations related to cybersecurity such as the Electronic Information and Transaction Law No. 11 of 2008, Government Regulation on the Implementation of Electronic Systems and Transactions No. 82 of 2012, which compiles a national framework for cyber-security. 2) In order to overcome cyber crime, the policy that has been implemented by the Ministry of Defense and Security is to form a Cyber Defence Operation Center Working Team which aims to maintain internal security and protection (Kemhan) as well as external security and protection (national) in the cyber world. The Cyber Defence Operation Center in the level of national cyber-security policy is aimed at building a universal defense system that involves all citizens, regions and other national resources to uphold state sovereignty, territorial integrity and the safety of the entire nation from the threat of cybe. 3) The Ministry of Defense is an agency that has full authority in the formation of cyber armies. Various ways can be done in recruiting cyber soldiers such as TNI recruitment in general, or recording all current TNI members who have more abilities and expertise in the IT field to be transferred to become cyber soldiers who will of course be given special training on cyber and cyber force.

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