The United States has historically been a strong partner in cyber diplomacy for the EU based on common values (human rights, rule of law), goals (open, stable and secure cyberspace) and interpretation of international law. Cyber diplomacy with the US has also been operationalised in the form of information-sharing and cooperation to tackle cybercrime, cooperation on cyber defence via NATO and cyber capacity building in third countries. Despite differences over certain foreign policy issues, the EU and the US remain close allies in cyberspace.

The digital economy is amongst the most powerful loci of Canadian economic growth; over the past decade, the digital economy grew roughly 40 per cent faster than – and generated almost four times as many jobs as – the overall economy. However, this spurt has also led to increased vulnerabilities in relation to cybersecurity; in 2020, successful cyber attacks affected 78% of Canadian companies. Canada has quietly developed a robust cyber diplomacy approach aiming at promoting a rules-based international order in cyberspace, in line with the goals of other ‘like-minded’ states (including European Union countries). Both the EU and Canada share a vision of cyberspace as a domain of human activity that is open, free, and secure, and which is characterized by due regard for fundamental rights and democratic values. As such, Canada is an important strategic partner for Europe.

China has the largest amount of users in the world, a significant digital economy growth potential, and its national Internet giants Alibaba, Didi, Tencent and Baidu are increasingly able to rival the biggest Western competitors in terms of market value and influence on the global tech landscape. China’s cyber diplomacy puts special attention towards equal participation, the principles of non-interference in internal affairs, non-use of force and peaceful settlement of disputes, and support for multilateral institutions to shape normative views on the governance of cyberspace. However, China’s propagation of the cyber-sovereignty approach to international cybersecurity policy and an absolutist reading of sovereignty in cyberspace provide a legal cloak for state practices that often run counter to the core European values of a global, open, and free Internet.

The US believes that international law is applicable in cyberspace. As part of the ‘like-minded’ coalition, the US recognises a need to acknowledge the full breadth of relevant international law, including international humanitarian law (IHL), human rights law, customary international law on the responsibilities of states for internationally wrongful acts. The general applicability of IHL in cyberspace is not to be misconstrued as a tacit endorsement of aggression in the cyber domain; instead, it only serves to remind states of the responsibility to respect and protect civilians in the event of armed conflict. 
In the context of multilateral fora, US diplomats have specifically emphasised the applicability of the right to self-defence under Art. 51 of the UN Charter, noting that a State may lawfully take cyber-based or non-cyber-based countermeasures in response to internationally wrongful cyber activities attributable to another State, but only subject to the requirements of the doctrine under international law and the principles of necessity and proportionality.

As per the conclusions of the 2013, 2015, and 2021 UN GGE (Group of Governmental Experts) reports, Canada believes that international law applies in cyberspace and is “essential to maintaining peace and stability” as well as “promoting an open, secure, peaceful, and accessible ICT environment”; according to Canada, the applicability of international law “puts guardrails on states’ behaviour in cyberspace”. Applicable legal instruments include the UN Charter, the law on state responsibility (including countermeasures), International Human Rights Law, and International Human Rights Law (IHL). Canada does not favour the establishment of a treaty or binding legal instrument on cyber issues, arguing that it would undermine existing international law and norms of responsible state behaviour. Instead, Canada believes that existing international law and agreed-upon norms are sufficient to guide State behaviour in cyberspace.

In theory, China accepts that the principles enshrined within the UN Charter, including sovereign equality, prohibition on the use of force, settlement of disputes by peaceful means, non-intervention in the affairs of other states and fulfilment of international obligations in good faith, apply in cyberspace. 
Nevertheless, the Chinese position is generally characterized by a reluctance to crystallise the precise ways in which existing customary and international treaty law might govern the cyber domain; the exact application of specific aspects of international law, such as laws on self-defence, state responsibility, and international humanitarian law, is claimed to remain unclear in the absence of international consensus. 
Chinese delegations have also repeatedly cautioned against the “indiscriminate application of the law of armed conflicts”, arguing that the undue emphasis on jus ad bellum undermines stability in cyberspace by presupposing and thus effectively legitimising cyber conflict, consequently turning cyberspace into a “new battlefield”. 
China regards proposals on regional exchanges of views and development of common understanding on the application of international law with particular scepticism, stating that states must work on reaching “universally-accepted consensus” on the application of international law, rather than engage in “self-explanations at regional levels or among a small group of countries”. The Chinese have also consistently favoured the adoption of new international legal instruments tailored to the attributes of cyberspace (lex specialis).

As stated in the 2018 National Security Strategy, the United States views voluntary, non-binding norms of state behaviour during peacetime as essential components of a framework of responsible State behaviour in cyberspace. The US has participated in all iterations of the UN Group of Governmental Experts (UNGGE) as well as the latest Open-Ended Working Group.
In these multilateral fora, US diplomats have typically opposed attempts at shifting to a legally binding status for norms of responsible state behaviour, arguing that such discussions are “premature” and do not represent the best way to address the immediate threats given the fast pace of technological developments. 
The starting basis for any further discussions on the part of the US rests on the current buildup of consensus surrounding the norms identified in the 2015 and 2021 GGE reports. Efforts should be concentrated on the implementation of existing consensus norms, not the creation of entirely new normative concepts (i.e. in relation to harmful hidden functions and specific critical infrastructure sectors).

Canada regards the applicability of norms of responsible state behaviour in cyberspace, together with existing international law, as the “foundation of sustaining international peace and security […] in cyberspace”. This is why it has strongly promoted the adoption and implementation of the UN GGE norms in various fora, including the G7, G20, North American Leaders’ Summit, NATO, ASEAN, and the OSCE. From Canada’s perspective, there is no need to develop new norms; international cooperation efforts should instead focus on fostering States’ capacity-building abilities, as well as the implementation and operationalization of existing norms. Canada has also been the biggest proponent of taking gender considerations into account when discussing the implementation of cyber norms, advocating for greater women’s participation and gender equality in the field of cybersecurity.

China’s International Strategy on Cyberspace Cooperation highlights that the country is committed to the maintenance of peace and stability in cyberspace through international cooperation on norms of responsible state behaviour. In 2018, Chinese support for the Russia-sponsored UNGA Resolution A/RES/73/27 was instrumental in establishing the Open-Ended Working Group (OEWG) as an alternative forum to the UN Group of Governmental Experts (UN GGE), whose fifth iteration in 2017 had failed to reach consensus. 
The country is in favour of formulating new norms of responsible state behaviour in light of recent ICT developments; during the latest OEWG discussions, China put forward specific proposals on formulating new rules on data security, in accordance with its own Global Initiative on Data Security. 
China has repeatedly expressed a preference for non-voluntary, binding legal norms, arguing that the best option is to formulate “new international legal instruments consummate with the characteristics of cyberspace, with a view to maintaining peace in cyberspace, instead of using legal instruments as a tool to pursue accountability and punishment unilaterally.”

The March 2021 Interim National Security Strategic Guidance states that “[the US] will make cybersecurity a top priority, strengthening our capability, readiness, and resilience in cyberspace.” Following the recommendations of the 2020 Solarium Commission, the US government has adopted the concept of ‘layered resilience’ and is gradually rolling out a comprehensive arsenal of resilience measures across a variety of domains. 
The US has been active in engaging in strategically-minded capacity building with partners; US capacity building in Africa with organisations such as the African Union and SADC, for instance, have been largely motivated by Washington’s wish to promote an open, secure, and democratic model for Internet governance across the African continent. 
In relation to cyber defence, there have been several joint operations and military exercises, both bilaterally (e.g. between the US Cyber Command and the Montenegrin military) and under the auspices of NATO. Recent regional engagement efforts such as the dialogues in the context of the tripartite AUKUS coalition and the Structured Quadrilateral Security Dialogue (the eponymous Quad) also heavily feature references to collaborative cyber-capacity building. In multilateral fora, the US has also welcomed the inclusion of confidence-building measures in the GGE reports and noted that, in order for CBMs to be useful, they need to be implemented at minimum on a bilateral basis and preferably on a multilateral and eventually an international basis.

The Canadian National Cyber Security Strategy puts an emphasis on “secure and resilient Canadian systems”, specifically critical infrastructure such as electricity grids, communications networks, and financial institutions. The ambition to help other countries expand their capacity building activities has been a key aspect of Canada’s cyber engagement strategy and its concurrent aim of promoting an “open, secure, and multistakeholder-led Internet”. Under the auspices of the OEWG, Canada has argued that “member States must make cyber security capacity development a priority at the highest level” and that “it is […] important to analyze and assess the capacity building needs collaboratively and agree on a collective approach”. Through the Anti-Crime Capacity Building Program (ACCBP), Canada has committed $27.7M to cyber capacity building, primarily in Latin America. ACCBP also assists countries in developing their own national cyber strategies and cybersecurity standards while also ensuring respect for human rights and privacy for all citizens. Meanwhile, Canada has been cooperating with several international and regional organizations on the development and implementation of Confidence-Building Measures (CBMs); for instance, there have been several Canadian initiatives at the OSCE, including workshops on international law and cyber operations as well as scenario-based discussions on CBM 5 (information sharing about national responses to regional cyber incidents). Canada believes that capacity-building should be multistakeholder and integrate the insights of the technical community as much as possible. The Canadian representative at the OEWG has also highlighted the importance of gender balance and the participation of women in capacity-building efforts.

The Chinese International Strategy on Cyberspace Cooperation places a large emphasis on the development of confidence-building measures (CBMs) and engagement with partner countries through predictability-increasing practical measures to prevent unintended conflicts, respond to information operations, and ensure supply chain security in network equipment and industrial control systems. 
Another key pillar of China’s cyber strategy is providing capacity-building assistance to developing countries. The Belt and Road Digital Economy International Cooperation Initiative, launched in 2017, and 'the Digital Silk Road' seek to internationalise Chinese technology made by state-owned or affiliated companies, including Huawei and ZTE, and therefore export Chinese technical standards abroad. Chinese outreach in this domain is most active in Africa, South America, and Central and Southeast Asia through projects such as the China-ASEAN Information Harbour and the China-Arabia Digital Silk Road Ningxia Hub. In addition to infrastructure investment, capacity building also focuses on enhancing information-sharing capacities, cyber defence personnel training, and crisis management.

The US is a signatory and an early proponent of the Budapest Convention. A big part of American cyber diplomatic activity has, in fact, been focused on promoting the Budapest regime as the global model of cybercrime governance. In 2019, the US firmly opposed the Russian-sponsored resolution calling for an alternative legal instrument to the Convention; following the passing of the resolution, however, the US has agreed to participate in the Ad Hoc Committee established under UNGA resolution 74/247 despite the fact that the “surprise text” within the May 2021 resolution was seen as an effort to “circumvent dialogue” and undermine the “balanced, inclusive, consensus-based process” sought by the US. 
On a multilateral level, the US is also a party to the UN Convention against Transnational Organised Crime (UNTOC) and the Inter-American Convention on Mutual Legal Assistance of the Organisation of American States (OAS) and is a member of Interpol. 
Bilaterally, the US has completed an agreement with the UK under the CLOUD Act that facilitates cross-border data sharing directly between US companies and the British government; the US is trying to expand this type of bilateral engagement, currently negotiating a similar agreement with Australia.

Canada’s National Cyber Security Strategy identifies the activities of malicious cyber actors as a “growing challenge”. Following the adoption of the ‘Protecting Canadians from Online Crime’ Act, Canada acceded to the Council of Europe’s Budapest Convention in 2015 and has since consistently promoted the instrument as the “best tool to fight cybercrime at the international level”. Canada has specifically “encourage[d] countries to bolster their anti-cybercrime efforts by becoming Parties to the Convention, or using it as a model to implement their own cybercrime laws”. Moreover, upon Canada’s initiative, the Quintet of Attorneys General (which brings together Attorneys General from Canada, the US, Australia, New Zealand and the UK) issued a public statement at their July 2019 meeting, expressing their support for the Budapest Convention as a “necessary basic framework for fighting cybercrime” and for the work of the United Nations Open-Ended Intergovernmental Expert Group on Cybercrime (UNIEG). Being part of the ‘like-minded’ group of states, Canada voted against the Russian-sponsored UNGA Resolution 74/247 aiming at establishing an alternative cybercrime instrument; upon the passage of 74/247 and its follow-up UNGA Resolution 75/282, however, Canada has been a vocal member of the Ad Hoc Committee on Cybercrime. Prior to the Committee’s May 2021 organizational session, the Canadian position paper on the Implementation of 74/247 noted that the Committee must “ensure consistency with existing UN treaties in the field of crime prevention and criminal justice, in particular the United Nations Convention against Transnational Organized Crime, the United Nations Convention against Corruption and take into account multilateral instruments that have already proven their usefulness in the fight against cybercrime, in particular the Council of Europe Convention on Cybercrime”. In the same document, Canada emphasized the need for an “inclusive, transparent, constructive, and consensus-based process that will lead to a fair outcome to the benefit of all”. The first session of the Ad Hoc Committee will be held in New York from 17 to 28 January 2022. Canada’s perspective on the scope, objectives, and structure of the convention was submitted to the Ad Hoc Committee in advance of the start of the first negotiation session (E).

The Chinese Strategy on Cyberspace Cooperation notes that the country “supports the UN Security Council to play an important part in international cooperation against cyber terrorism” and “supports and contributes to UN effort on fighting cyber crimes”. China is not a party to or observer of the Budapest Convention; instead, it has consistently backed Russian bids in the UN to establish a new cybercrime treaty, with these efforts culminating in Resolution A/74/247 that created an Ad Hoc Committee for that purpose. 
China has also signed the World Intellectual Property Organization Copyright Treaty (WIPO Copyright Treaty) in 1985 as well as the UN Convention Against Transnational Organised Crime and is a member of Interpol. 
In addition, China has pursued regional avenues of cooperative engagement; within the context of the Shanghai Cooperation Organisation, for instance, the country agreed to participate in efforts to fight against terrorism, separatism, extremism, and international cybercrime. 
It also supports joint cybersecurity exercises under the auspices of the Organisation.