Joint Doctrine Note 1/18 Cyber and Electromagnetic Activities Joint Doctrine Note (JDN) 1/18, dated February 2018, is promulgated as directed by the Chiefs of Staff Assistant Head Doctrine Conditions of release This publication is UK Ministry of Defence Crown copyright. Material and information contained in this publication may be reproduced, stored in a retrieval system and transmitted for UK Government and MOD use only, except where authority for use by other organisations or individuals has been authorised by a Patent Officer of the Defence Intellectual Property Rights. JDN 1/18 i