On June 26, 1945, the UN Charter was signed by 50 states. The increased international cooperation established by this charter was intended to ensure lasting peace. Even today - 75 years later - our world order cannot be imagined without the principles of the charter, which defines peaceful intergovernmental cooperation and is regarded as the foundation for maintaining international security. But the way wars are fought has changed fundamentally in recent decades. The rules of engagement - the rules for the deployment of armed forces - were designed for traditional military operations on land, air, and sea. Nowadays, however, conflicts are often extended into the digital space, as states pursue their interests - both offensively and defensively. In 2013, a group of international legal experts attempted for the first time to establish a comprehensive set of rules for conflicts in cyberspace with the Tallinn Manual 2.0. This covers the two main areas of cyber warfare: the jus ad bellum, which regulates the use of cyber force by states, and the jus in bello, the law that governs how states might conduct their cyber-operations. Diplomatic efforts like this can be effective in cybersecurity, especially when in the form of bilateral agreements such as the treaty agreed between the USA and China in 2015. Diplomacy has also produced some multilateral agreements covering both the private and public sectors such as the “Accords de Paris” in 2019 which aims to keep cyberspace as safe, stable, and open as possible. The United Nations also has groups focused on encouraging nations to work together on this issue, such as the Open-Ended Working Group on cyberspace and the UN GGE (Governmental Group of Experts). It would be great to see them focus on defining the rules of engagement and to share this framework with all member states in order to minimize the risks and escalation of conflicts. In order for these types of diplomatic agreements to be successful and widely adopted, a core element must be the exchange of threat information. When states share their collected knowledge about attacks and actors as well as their tools and techniques with the community of states, this improves the defense capabilities of all participants and consequently the global security level. Moreover, in some cases, such an exchange makes it possible to assign observed attacks to the actors behind them. Often attackers remain anonymous or deliberately carry out attacks in such a way that other actors are suspected. Improved international cooperation, initiated by the United Nations, could facilitate the increased attribution of attacks and work towards ensuring that those responsible can be held accountable. The possibility of imposing sanctions for a clearly identified attack could serve as an important deterrent and have a positive impact on state security.  Read Less