The firm's Worldwide Semiannual Security Spending Guide forecast a compound annual growth rate of 9.2% in security spending over the 2018-2022 period, with 2022 seeing expenditure of US$133.8 billion.
Banking, discrete manufacturing and federal/central governments would spend more than US$30 billion together in 2019, IDC said, with process manufacturing, professional services and telecommunications splashing out more than US$6 billion apiece for the year.
Sectors that would see the fastest spending growth over the 2018-22 period were state/local governments (11.9% CAGR), telecommunications (11.8% CAGR) and resources (11.3% CAGR). This would make telecommunications fourth in the security spending ranks in 2022 while state/local governments would move ahead of professional services to sixth position.
"In addition, information-based organisations like professional services firms and telcos are ramping up spending. But regardless of industry, these technologies remain an investment priority in virtually all enterprises, as delivering a sense of security is everyone's business."
The US will be the single biggest market for security solutions with a spending forecast of US$44.7 billion in 2019. Discrete manufacturing and the federal government will account for nearly a fifth of this total.
The second largest will be China, where security purchases by three industries — state/local government, telecommunications, and central government — will make up 45% of the total. Japan and the UK are the next two, with security spending led by the consumer sector and the banking industry respectively.
IDC said managed security services would be the largest technology category in 2019, with firms spending more than US$21 billion for monitoring and management of security operations centres, and also the largest category of spending for the top five industries this year.
The second largest would be network security hardware, which includes unified threat management, firewalls, and intrusion detection and prevention technologies. The third and fourth largest investment categories will be integration services and endpoint security software.
Technology categories likely to see the fastest spending growth over the 2018-2022 period would be managed security services (14.2% CAGR), security analytics, intelligence, response and orchestration software (10.6% CAGR), and network security software (9.3% CAGR).
"The security landscape is changing rapidly, and organisations continue to struggle to maintain their own in-house security solutions and staff," said Martha Vazquez, senior research analyst, Infrastructure Services.
"As a result, organisations are turning to managed security service providers to deliver a wide span of security capabilities and consulting services, which include predicative threat intelligence and advanced detection and analysis expertise that are necessary to overcome the security challenges happening today as well as to prepare organisations against future attacks."