From the Cyber Vault
Major William C. Ashmore, School of Advanced Military Studies, United States Army Command and General Staff, Impact of Alleged Russian Cyber Attacks, 2009. Unclassified.
This monograph was written to examine the implications of alleged Russian cyber attacks against Estonia and Georgia for the Russian Federation, former Soviet satellites, and international organizations.
NATO Cooperative Cyber Defence Centre of Excellence, National Cyber Security Framework Manual. 2012. Unclassified. 
This document outlines a framework and methodology for developing a complete national strategy for cyber security.
NATO Cooperative Cyber Defence Centre of Excellence, The Cyber Defence Unit of the Estonian Defence League: Legal, Policy and Organisational Analysis, 2013. Unclassified.
This document outlines Estonia's cyber defense capabilities, policies, and legal frameworks.
Ministry of Economic Affairs and Communication, Government of Estonia, Cyber Security Strategy 2014-2017, 2014. Unclassified.
This strategy document contains an analysis of the current situation, principles of ensuring cyber security, the general goals of the strategy for 2017, subgoals, and the entities related to the strategy.
Information Systems Authority, Republic of Estonia, 2014 Annual Report, Cyber Security Branch of the Estonian Information Systems Authority, 2014. Unclassified.
This report discusses 2014 cyber incidents, studies and guidelines, the prevention of cyber risks, international cooperation in 2014, and significant changes in Estonia's legislative and strategic framework for cyber security.
Michael Connell and Sarah Vogler, Center for Naval Analysis, Russia's Approach to Cyber Warfare, March 2017. Unclassified.
This paper examines both the theoretical and practical underpinnings of the Russian approach to cyber warfare. It contains chapters on cyber as a subcomponent of information warfare, organizations and agencies, hacktivists and criminals, three case studies of Russian cyber operations (Estonia in 2007, Georgia in 2008, and Ukraine from 2013 to the present), and chapters on bots, leaks, and trolls.
Defense Intelligence Agency, Russian Military Power, June 2017. Unclassified.
One section of this study addresses Russian cyber activities, including cyber-enabled psychological operations (including the use of hacktivists, trolls, and bots) and information defense.