Digital Sovereignty must be on the agenda of every modern nation. Digital technology is becoming part of our life details, from the vital essentials, like food and water management, to transcendence in the Metaverse and Space. Protecting these digital assets will, therefore, be inevitable for a modern country to live, excel and lead. Digital Sovereignty is a strategic necessity to protect these digital assets from the monopoly of friendly rational states, and the threats of unfriendly Malicious states and behaviors. In this work, we revisit the definition and scope of digital sovereignty through extending it to cover the entire value chain of using, owning, and producing digital assets. We emphasize the importance of protecting the operational resources, both raw materials and human expertise, in addition to research and innovation necessary to achieve sustainable sovereignty. We also show that digital sovereignty by autonomy is often impossible, and by mutual cooperation is not always sustainable. To this end, we propose implementing digital sovereignty using Nash Equilibrium, often studied in Game Theory, to govern the relation with Rational states. Finally, we propose a digital sovereignty agenda for different country's digital profiles, based on their status quo, priorities, and capabilities. We survey state-of-the-art digital technology that is useful to make the current digital assets sovereign. Additionally, we propose a roadmap that aims to develop a sovereign digital nation, as close as possible to autonomy. Finally, we draw attention to the need of more research to better understand and implement digital sovereignty from different perspectives: technological, economic, and geopolitical.

翻译：数字主权必须成为每个现代国家的议程。数字技术正成为我们生活细节的一部分，从食品和水管理等基本必需品，到元宇宙和太空中的超越性体验。因此，保护这些数字资产对于现代国家生存、卓越发展和引领未来至关重要。数字主权是一项战略需求，旨在保护这些数字资产免受友好理性国家的垄断以及不友好恶意国家和行为的威胁。在本文中，我们重新审视了数字主权的定义和范围，将其扩展到涵盖使用、拥有和产生数字资产的整个价值链。我们强调了保护运营资源（包括原材料和人力专业知识）的重要性，以及实现可持续主权所必需的研究和创新。我们还表明，通过自主实现数字主权往往不可行，而通过相互合作则并非总是可持续。为此，我们提出利用博弈论中常研究的纳什均衡来实施数字主权，以规范与理性国家的关系。最后，我们根据不同国家的现状、优先事项和能力，为其数字档案提出了数字主权议程。我们调查了有助于使当前数字资产实现主权的先进数字技术。此外，我们提出了一条旨在开发尽可能接近自主的数字主权国家的路线图。最后，我们呼吁需要更多研究，以从技术、经济和地缘政治等不同角度更好地理解和实施数字主权。