A/70/174 Letter of transmittal 26 June 2015 I have the honour to submit herewith the report of the Group of Governmental Experts on Developments in the Field of Information and Telecommunications in the Context of International Security. The Group was established in 2014 pursuant to paragraph 4 of General Assembly resolution 68/243 on developments in the field of information and telecommunications in the context of international security. As Chair of the Group, I am pleased to inform you that consensus was reached on the report. In its resolution, the General Assembly requested that a group of governmental experts be established in 2014, on the basis of equitable geographical distribution, to continue to study, with a view to promoting common understandings, existing and potential threats in the sphere of information security and possible cooperative measures to address them, including norms, rules or principles of responsible behaviour of States and confidence-building measures, the issues of the use of information and communications technologies in conflicts and how international law applies to the use of information and communications technologies by States, as well as the concepts aimed at strengthening the security of global info rmation and telecommunications systems. The Group was also asked to take into account the assessments and recommendations of a previous Group (see A/68/98). The SecretaryGeneral was requested to submit a report on the results of the study to the Assembly at its seventieth session. In accordance with the terms of the resolution, experts were appointed from 20 States: Belarus, Brazil, China, Colombia, Egypt, Estonia, France, Germany, Ghana, Israel, Japan, Kenya, Malaysia, Mexico, Pakistan, the Republic of Korea, the Russian Federation, Spain, the United Kingdom of Great Britain and Northern Ireland and the United States of America. The list of experts is contained in the annex. The Group had a comprehensive, in-depth exchange of views on developments in the field of information and telecommunications in the context of international security. It met in four sessions: the first from 21 to 25 July 2014 at United Nations Headquarters, the second from 12 to 16 January 2014 in Geneva and the third from 13 to 17 April 2015 and the fourth from 22 to 26 June 2015, both at United Nations Headquarters. The Group would like to thank the experts who served as facilitators in the discussions on the draft report: Florence Mangin (France), Katherine Getao (Kenya), Ausaf Ali (Pakistan), Ricardo Mor (Spain) and Olivia Preston (United Kingdom). The Group wishes to express its appreciation for the contribution of the United Nations Institute for Disarmament Research, which served as a consultant to the Group and was represented by James Lewis and Kerstin Vignard. The Group also wishes to express its appreciation to Ewen Buchanan of the United Nations Office for Disarmament Affairs, who served as Secretary of the Group, and to other Secretariat officials who assisted the Group. (Signed) Carlos Luís Dantas Coutinho Perez Chair of the Group 15-12404 5/17