Space Security Index

The purpose of the Space Security Index (SSI) is to facilitate dialogue on space security challenges and potential responses. The annual report also provides a comprehensive pedagogical tool on the concept of space security to inform debate among stakeholders and policy-makers. Therefore, the Space Security Index provides facts and focus in an important debate that has become unnecessarily polarized.

It is the first and only annual, comprehensive, and integrated assessment of space security. Based on nine indicators of space security, it provides background information and in-depth analysis on key space security trends and developments. The annual assessment has two key components:

  • A policy-neutral fact-base of trends and developments in space security based on primary, open-source research.
  • An assessment of the status of space security based on a consultative process engaging a broad cross-section of space stakeholders through an online expert survey and a working group of space experts.

The definition of space security guiding this report reflects the intent of the 1967 Outer Space Treaty that outer space should remain open for all to use for peaceful purposes now and in the future:

"The secure and sustainable access to, and use of, space and freedom from space-based threats."

Space Security Index 2017 is the fourteenth annual report on developments related to safety, sustainability, and security in outer space, covering the period January-December 2016.  

It is part of the broader Space Security Index (SSI) project, which aims to improve transparency on space activities and provide a common, comprehensive, objective knowledge base to support the development of national and international policies that contribute to the security and sustainability of outer space.

Click here to download the SPACE SECURITY INDEX 2017 - Executive Summary

Click here to purchase the SPACE SECURITY INDEX 2017 - Full Report


The Space Security Index is a research partnership made possible by financial and in-kind support from The Simons Foundation; Project Ploughshares; Erin J.C. Arsenault Trust Fund at McGill University; Institute of Air and Space Law at McGill University, Research Unit for Military Law and Ethics at the University of Adelaide, The School of Law at Xi'an Jiaotong University, and the Space Policy Institute at George Washington University.