Thanks to its regulatory powers, robust digital economy, and active foreign and security policy, the European Union is one of the key players in cyberspace. The EU strongly promotes the position that international law, and in particular the United Nations (UN) Charter, applies in cyberspace. As a complement to binding international law, the EU endorses the voluntary non-binding norms, rules and principles of responsible State behaviour that have been articulated by the UN Group of Governmental Experts. It also encourages the development and implementation of regional confidence building measures, both in the Organisation for Security and Co-operation in Europe and other regions. On a bilateral level, the EU has established cyber dialogues with strategic partners to reinforce the exchange of good practices, lessons learnt and further the idea of responsible state behaviour 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.

Over the past decade, Australia has been a frontrunner in terms of digital transformation; the country ranked 11^th globally on the 2020 Global Connectivity Index and 2^nd in the Indo-Pacific. Australia’s better-than-expected economic performance in 2021 was largely owed to increased government efforts at promoting the digitalisation of businesses and government services, with significant investment being poured into the ICT sector under the Digital Economy Strategy and the Regional Connectivity Program. Meanwhile, however, self-reported losses from cybercrime amounted to more than $33 billion during the 2020-2021 financial year (E), while roughly a quarter of cyber incidents reported during the same period involved Australia’s critical infrastructure or essential services (E). In the cyber diplomacy realm, Australia has traditionally been a prominent member of the ‘like-minded’ group, promoting a vision of a free, open, and secure cyberspace that is very much in line with EU values and efforts.

Under the auspices of the UN, the EU and its Member States have consistently reaffirmed that a universal cyber security framework can only be grounded in existing international law, including the Charter of the United Nations in its entirety, international humanitarian law, and international human rights law. 
Addressing issues as to how existing international law and international humanitarian law, including the principles of humanity, necessity, proportionality and distinction, apply to the use ICTs by States is necessary to increase accountability and transparency. International humanitarian law is fully applicable in cyberspace and this should not be misunderstood as legitimising the use of force between states in the cyber domain. The EU has typically opposed calls for the need to adapt existing international law as a means to develop a new legal instrument for cyber issues.

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.

Australia believes that “the foundation for responsible state behaviour in cyberspace is our mutual commitment to existing international law” and that, as per the 2021 report of the Open-Ended Working Group (OEWG), international law is “essential to maintaining peace and stability and promoting an open, secure, […] stable, accessible and peaceful ICT environment.” In particular, Australia has affirmed that the UN Charter applies in its entirety to state actions in cyberspace, including the prohibition on the use of force, the peaceful settlement of disputes, the right to self-defence in response to an armed attack, the law of state responsibility during peacetime, and the doctrine of countermeasures in response to internationally wrongful acts. International legal obligations also include the respect for human rights and fundamental freedoms (especially the right to privacy and freedom of expression), as well as the application of international humanitarian law (IHL) to cyber operations in armed conflict. On the application of IHL, Australia echoes the position taken by the ICRC that “recognition of the application of IHL neither encourages militarisation, nor legitimises resort to conflict in any domain”.

Since 2014, the EU’s ambition has been to act as an ‘honest broker’ on multilateral discussions surrounding issues of cyber governance and norms of responsible state behaviour, aiming to ensure the support and partnership of proactive players in the context of the global debate. The EU has long promoted the need for voluntary, non-binding norms. It believes that norms crystallised under the UN GGE process should generally not be revisited and that progress should be made on matters relating to their implementation. 
Within the OEWG, the EU advanced a suggestion to develop a global repository of existing practice within the United Nations, which would enable UN member states to showcase how they are implementing the voluntary norms of responsible state behaviour, confidence building and other measures.

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.

Australia has been actively involved in both norm-building processes that have been occurring under the auspices of the UN, namely the UN Open-Ended Working Group (GGE) and the OEWG. The country’s 2021 International Cyber and Critical Tech Engagement Strategy notes that the 11 voluntary, non-binding norms on responsible state behaviour agreed under the 2015 UN GGE consensus reports serve to “promote predictability, stability, and security” in cyberspace and should be seen as the “point of departure” for any constructive norm-building discussion. Australian diplomats have consistently reiterated the complementarity between international law and norms of responsible state behaviour, stating that “norms are not a panacea” and that they should not be understood as a standalone “normative framework”, since they do not replace existing state obligations under international law. For this reason, Australia stands against the establishment of binding norms or agreements. The country is not prima facie opposed to discussing other states’ proposals for the development of new norms, but Australia’s own “proactive priority” is reaching agreement of guidance on the implementation of the existing norms. In the current environment, Australia believes that “we will have the biggest impact on international peace and stability if we translate norms ‘on paper’ into norms ‘in practice’”. While not discounting the value of “norms agreed among friends”, it has also highlighted that the framework will only be effective when it is any proposals for new norms would first need to be negotiated, agreed upon, and endorsed by universal consensus.

The EU places great importance on cyber resilience and capacity building. Internally, the Union has built a robust legal acquis in relation to the resilience of critical infrastructures, the cornerstone of which rests upon the 2016 Network and Information Security (NIS) Directive and the 2013 and 2019 Cybersecurity Acts. This legal meshwork seeks to integrate cybersecurity into all elements of the supply chain and introduce soft law mechanisms like the EU cybersecurity certification scheme. In doing so, it harmonises national cybersecurity capabilities, cross-border collaboration and the supervision of critical sectors across the EU. 
In the coming months, the Commission intends to add upon the existing cyber-acquis by introducing an array of new initiatives, such as the updated NIS Directive (the so-called NIS2), a proposal on a Critical Entities Resilience (CER) Directive, and a plan to launch a network of Security Operations Centres across the Union. The aim is to create a Union-wide ‘cybersecurity shield’ that will facilitate the detection of cyberattacks and provide an impetus for proactive action. 
This internal buildup of capabilities is supplemented by the development of a specialised ‘cyber diplomacy toolbox’ that allows the Union and its Member States to address cyber incidents through various joint policies, from cooperation and stabilisation measures to restrictive measures and attribution.

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.

In recent years, Australia has emerged as a regional leader in conversations surrounding cyber resilience in the Indo-Pacific as well as globally. The new 2021 International Cyber and Critical Tech Strategy constitutes one of the most comprehensive documents of its kind, with “secure, resilient, and trusted technology” representing a crucial objective. Key initiatives include enhanced protections for critical infrastructure
and systems of national significance, as well as greater support for businesses
and individuals to develop their cybersecurity resilience. In the past three years, Australian cyber diplomats have brokered a series of bilateral partnerships in the form of cyber Memoranda of Understanding (MOUs); currently there are agreements with India (2020), Indonesia (2018), Papua New Guinea (2018), Singapore (2020), and Thailand (2019), all of which include capacity-building and information-sharing elements. On a regional level, the country is chairing the Asia-Pacific CERT community and the Asia-Pacific cybersecurity operations network. Australians have also significantly extended their regional outreach through their flagship capacity-building initiative, the Cyber and Critical Technology Cooperation Program. Meanwhile, Australia participates in several multipartite initiatives with a strong cyber component such as the Structured Quadrilateral Security Dialogue (the eponymous Quad) along with India, Japan, and the US, and the tripartite AUKUS coalition along with the US and the UK. In international fora, Australia has been a vocal champion of increased international collaboration in cyber capacity building (CCB), welcoming references to further cooperation within the 2021 OEWG report but cautioning against limiting such cooperation to the protection of national, translational and supranational infrastructure. Australia has also argued that CCB should be mainstreamed into the larger development agenda of the UN, specifically the Sustainable Development Goals.

The EU has been an early champion of the Budapest Convention signed under the auspices of the Council of Europe, given the overlapping membership of the two organisations. Much of the EU’s cyber diplomatic efforts have focused on promoting the Convention as the main instrument of choice for fighting cybercrime on a global level. EU member states have consistently opposed Russian bids for replacing this regime with another legal framework. 
The Union is represented in the recently constituted Ad Hoc Committee established by UNGA resolution 74/247 by its Member States and is currently focused on ensuring that the process is inclusive, transparent, consistent with the progress of the UNGGE and OEWG processes, and committed to legal consistency.

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.

The 2021 International Cyber and Critical Tech Engagement Strategy recognises that Australia, and the Indo-Pacific region more widely, faces a “worsening” cybercrime landscape characterized by “expanding threats, low barriers to entry, and increasingly resourceful actors”. Australia acceded to the Council of Europe’s Budapest Convention in 2013 and has since been vocal about the Convention’s status as the “most comprehensive and effective basis upon which to pursue a common international approach”. The country voted against the Russia-sponsored UN resolution on the establishment of a new cybercrime treaty; however, upon the passage of the resolution and the subsequent creation of a dedicated Ad Hoc Committee, Australia has been active in advocating for a “transparent, inclusive, and consensus-based process with multi-stakeholder participation”. More specifically, it has stated that the new Convention should “draw heavily” from existing international instruments such as the UN Convention against Transnational Organized Crime (UNTOC), the UN Convention against Corruption (UNCAC), and especially the Budapest Convention, so as to avoid undermining these regimes and ensure the protection of human rights. Australia has additionally placed great emphasis on the need for international cooperation, with the 2021 Strategy noting that “information sharing, discussion and capacity building are vital to any meaningful response to the threat posed by cybercrime”. The country has launched numerous regional cooperation and capacity-building initiatives, partnering with Pacific Island countries (Tonga, Fiji, Samoa, Vanuatu, Solomon Islands, Niue, Tuvalu) to advance cybercrime law reform and ensure alignment with Budapest provisions.