(Bloomberg) -- Businesses and homes are increasingly vulnerable to cyber attacks as people install Internet-connected appliances and companies rely on outdated systems, U.K. Chancellor of the Exchequer Philip Hammond warned.

Hammond used a speech in London Tuesday to set out the British government’s Cyber-Security Strategy, pledging to “strike back” against malicious activity. It came as the U.K.’s spy chief warned Russia is using the same online tools to target Britain. In an interview with the Guardian newspaper, MI5 Director General Andrew Parker said Russia is an increasing threat to the U.K. and is employing cyber attacks to threaten its industry, economy and military capability.

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