Differential Game Analysis of Enterprises Investing in New Infrastructure and Maintaining Social Network Security Under the Digital Innovation Ecosystem

With the new round of industrial and technological revolution in China, the new normal of the Chinese economy is increasingly in the form of a digital economy characterized by continued growth and development potential. The digital economy has become an important engine driving the growth of the Chinese economy. The digital transformation of enterprises is a hot topic and poses a difficult research problem. More importantly, ensuring the security of digitalization has become a common challenge faced by society. This paper analyzes the value composition of the digital innovation ecosystem and uses differential game theory to explore the optimal decision-making of leading enterprises and following enterprises in terms of digital innovation and social responsibility under different circumstances. The results show that in the digital innovation ecosystem, (1) leading enterprises and following enterprises have the least income, the weakest degree of digital innovation, and the weakest ability to maintain social network security under non-cooperative conditions; (2) overall income will increase over time, and digital innovation and the maintenance of social network security have a positive effect on the development of the digital economy; (3) the government encourages enterprises to develop digital innovation and maintain social network security and provides appropriate subsidies to some extent, which boosts the development of enterprises.