The concept of "cybersecurity" has been generally discussed in three dimensions:technology, crime and terrorism, and military. The distribution of power and discourse among stakeholders varies in different dimensions. At present, the discourse power of all parties are in contension for international rules of cyber security. The discourse power (the leading power) in the "cybersecurity" appears uneven in its distribution. The government expands its discourse power depending on technological development and application.Technology is the most basic and earliest determinant of "cybersecurity", while technology development and application are the cornerstone of the discourse power of all actors in the field of network security. The strong power and weak power in the "cybersecurity" have great differences of discourse power in making relevant security standard or agreement. In the technology of "cybersecurity", the right of making security standard and agreement is determined by two factors: history and technology. The game of the government’s discourse power is reflected in the competition for making international internet technological standard. However, technology only provides the basis for the expansion of discourse power. The reinforcement of discourse power still depends on the enhancement of institutional power and interpretative power of a government, among which the key is to transform the nationally developed technology standards to international practices.