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Cyber attacks are spiralling. The FT explores the risk - for governments, for employees, for the financial system, for companies - in its series, Cyber Insecurity. This is a story of the running battle between hackers and the internet-of-things that our world depends on.

Part 1

Cyber insecurity

Cyber insecurity: US losing the battle

FT investigation finds vital US agencies lack basic IT defences

Three of the agencies which have been targeted by hackers in the past two years
©FT montage; Dreamstime

Timeline: attacks on federal agencies

Increasing scale and frequency of attacks

Special Report

Illustration for Cyber Security April 2015 special report by Oivind Hovland ©Oivind Hovland
Technological advances, rising global tensions and human failings are making it ever more vital to improve cyber security

Cyber insecurity: aviation agency alert

US civil air authority failed to implement vital security

US President Barack Obama signs an executive order promoting private sector cybersecurity information sharing after speaking at the White House Summit on Cybersecurity and Consumer Protection at Stanford University in Palo Alto, California on February 13, 2015
©AFP/Getty Images

IT budgets cut even as cyber threat grows

Many US agencies have squeezed technology spending despite hacks

Part 2

Cyber insecurity: Hacking back

Companies are seeking to use more aggressive tactics to neutralise hackers. But the law limits how far active defence can go

Cyber Insecurity

Podcast discussion: The fight back

How banks, companies and governments are marshalling their cyber defences

Part 3

Cyber insecurity: When 95% isn’t good enough

Banks have poured millions of dollars into securing their computer networks, but number of hacks is rising

Part 4

West eyes Dr Strangelove strategy

Need for clearer offensive posture gains popularity

Part 5

©FT montage/Getty

Cyber insecurity: Going dark

US tech companies are shielding more data from government. But is it now harder to track terrorists?