Cyberspace is one of the areas that must be secured by the state, in addition to land, sea and air areas that are included in the national security landscape. However, among serious threats to the global world in recent years comes from cyber threats. Cyber threats potentially attack a country's assets, national interests, and can be carried out at any time. At the same time, internet users continue to increase significantly every year, particularly in Indonesia which reaches more than half of the total population. Majority of them even relies on several activities in the cyber space which require security aspects such as e-commerce, e-banking, etc. Thus, this condition requires good cyber security strategy in order to manage the situation.  Therefore, this work is aimed to discusses Indonesian national cyber security strategy in order to analyses problems and challenges towards Indonesian cyber security. Indonesia, in regulating cyber-security has several important regulations. Among of these important regulations are Law on Electronic Transaction and Information (UU ITE), and The Law on The Security of Personal Data (UU PDP). In terms of cyber security in Indonesia, there are several government agencies and NGO’s that play important role on cyber security measures in Indonesia. Furthermore, Indonesia also conducts several bilateral, regional, and multilateral cooperation on cyber security in order to solve the problem of cyber security. However, there are several challenges and problems on Indonesia cyber security that hindering Indonesia’s ability on cyber-security measures such as overlapping regulations, shortage of human resources, and ignorance and alienation of human and civil rights principles. Meanwhile, the level of internet usage in Indonesia continues to increase with the determination of technology in many aspects of people's lives.