Brazil is the world’s eighth largest economy in terms of GDP, and by far South America’s most populous and powerful state. While the country has suffered economic and political crises since 2014, it has made significant advances in domestic digitization and played a pivotal, albeit ambiguous role in international negotiations on cyberspace. Brazil has the world’s fifth largest internet user base, after China, India, the United States and Indonesia, and is a leading country in South America when it comes to ICTs usage. The share of Brazilians using the internet has increased from less than 3% of the population in 2000 to more than 68% in 2019. As such, Brazil remains a critical partner for the EU’s efforts to build a secure, stable and rights-based cyberspace.

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.

Japan is a trusted partner and shares the same basic values of human rights, rule of law, and democratic governance. This common set of values also applies to cyberspace as both the EU and Japan have publicly expressed strong support for an open, free and secure internet and the application of international norms to state activities in cyberspace. Japan is also an important trading partner of the EU. The recently adopted Economic Partnership Agreement also reinforces the need for a closer integration of the digital economies. Alignment in broader international economic and political issues is also evident in the field of cyber diplomacy and thus constitutes a strong foundation for close cooperation and partnership.

In accordance with the output produced by the 2013, 2015, and 2021 consensual reports of the United Nations Groups of Governmental Experts on Developments in the Field of Information and Telecommunications in the Context of International Security (UNGGE), Brazil believes that international law enjoys general applicability in cyberspace. For Brazil, this also includes international humanitarian law and international human rights law. Nevertheless, Brazilian delegations have expressed concern that unqualified transfers of international humanitarian law and an unlimited right of self-defence could legitimise cyberspace as a military domain, while also challenging the protective value of sovereignty and cementing a Western-biased status quo.

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.

Japan has highlighted the importance of promoting the rule of law in cyberspace, noting that cyberspace “should not be a lawless zone”. It further endorses the applicability of international law, in particular the UN Charter, in the cyber domain. In relation to the use of countermeasures, it has stated that it is not necessary for countermeasures to be limited to the same means as internationally wrongful acts. 
Japan has cautioned against the launch of “premature” discussions on developing a legally binding new instrument, arguing that the adoption of such an instrument might “roll back” the achievement of past multilateral efforts in confirming the applicability of existing international law in cyberspace. Instead, Japan believes that it is necessary to consolidate, elaborate, and clarify the interpretation of existing treaties and content of customary international law. 
During the drafting phase of the 2021 Open-Ended Working Group (OEWG) Report, Japan had proposed to include language explicitly affirming the applicability of State responsibility for internationally wrongful acts, the inherent right of self-defence recognized under the UN Charter, and International Humanitarian Law.

Brazilian diplomats portray Brazil’s role in the often polarised debates on norms of responsible state behaviour as that of a broker or strategic bridge-builder between the different camps rather than a mere ‘swing state’ and highlight that balancing between both camps serves to maintain an independent foreign policy. Brazil sought to focus its chairmanship of UN GGE’s third and fourth iterations on three issues: the role of civilians in cyber conflict, the right to respond, and attribution. Since the 2013 Snowden revelations, the country has been a stark champion of data protection, showcasing exceptional norm entrepreneurship
in relation to cyber-surveillance norms. Brazil has also expressed support for the proposal of adopting a legally binding instrument in the medium to long-term to prevent the militarisation of cyberspace.

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).

In multilateral fora, Japan has frequently emphasised the need to implement voluntary and non-binding norms of responsible state behaviour in cyberspace. The country believes that any discussion on norm-building should exclusively occur on the basis of the 11 norms affirmed within the 2015 UNGGE Report; possible new norms should be “carefully scrutinised” so as to avoid any change to these 11 norms or duplication with them. 
Japan also strongly opposes the adoption of additional legally binding obligations, maintaining that such an endeavour would take a very long time whereas the evolution of technology is extremely fast-paced. Instead, countries should work on parallel mechanisms for capacity-building, raising awareness, and promoting a common understanding of norms.

Brazil’s 2020 National Cybersecurity Strategy (E-Ciber) outlines ten strategic actions to be undertaken in relation to cyber resilience, which include the extension of international cooperation and the enhancement of protection for critical infrastructure. The Strategy pledges Brazil to encourage international cooperation in cybersecurity, participate in joint cyber resilience events and exercises, and expand cybersecurity cooperation agreements. On the level of discourse, Brazil remains committed to international cyber cooperation in resilience, staying true to its traditional stance in favour of multilateral solutions.

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.

Resilience constitutes one of the central objectives of Japan’s 2018 Cybersecurity Strategy, whose core components include international cooperation in sharing expertise and coordination of policies, incidence response, and cyber capacity-building (CCB). Japan has traditionally argued that global initiatives are required to reduce cybersecurity vulnerabilities and has advocated for a tailor-made approach that takes into account the national situation of recipient countries and the importance of national ownership. 
Japan recognises the ‘trickle-up’ effect of national initiatives, stating that CCB “not only improves the capabilities of the recipient country, but also directly leads to enhanced security and stability in cyberspace as a whole”; in that sense, it disfavours the understanding of CCB as a “common but differentiated responsibility”, believing that such a view “does not fit the context” of international cyber cooperation. As a result, the country has assumed a balanced approach to CCB. On the one hand, it has successfully utilised multilateral fora such as the G7 and G20 summits to promote its own normative standards. 
At the G7 Ise-Shina Summit in May 2016, for instance, Japan introduced the Ise-Shima Principles, which included the enhancement of cooperation on CCB. On the other hand, Japan considers its own security and that of its nationals as intrinsically tied to the cyber capabilities of developing countries, since attacks on the IT infrastructure of regional partners can adversely affect Japanese trade. Japan has thus acted primarily through ASEAN to promote regional capacity-building efforts.

Brazil originally refrained from signing the Budapest Convention on Cybercrime and had expressed scepticism in response to invitations to accede. The argument advanced was that the treaty is Western-biased and lacking in inclusivity, given that Brazil was not part of the original drafting process. During voting for UNGA Resolution A/74/401, the Russian-sponsored proposal for a new binding Cybercrime Convention, Brazil abstained; during meetings with the BRICS leaders, however, Brazil had endorsed Russian pleas for a new cybercrime instrument to replace the Budapest regime. Upon invitation by the Council of Europe, Brazil finally initiated the process of accession to the Convention in December 2019 and is now an observer country.

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.

According to Japan’s 2018 Cybersecurity Strategy, the country is committed to “further [promoting] international partnership through international investigative cooperation and information sharing with international organisations, law enforcement agencies and security information agencies in foreign countries.” 
Japan is a party to the Budapest Convention on Cybercrime and mutual assistance treaties (MLAT), voting against the Russian-sponsored UNGA resolution calling for a new binding cybercrime treaty. Japan has pursued dialogues related to cybercrime cooperation in the context of ASEAN, as well as on a bilateral basis with countries like the UK, USA, and Australia.