That concern should be a boon to the companies that make security software. Here are several that investors may want to consider.
Palo Alto Networks (PANW) is one. Its shares have more than doubled this year, and its revenue rose 50% in its latest quarter as it reported adjusted earnings per share that topped estimates by 3 cents. It continues to post net losses, however.
PANW data by YCharts
Cisco (CSCO) , whose shares are up about 27% this year, is No. 1 in market share in security software, according to according to research firm IDC. Security has become the company's fastest-growing segment as revenue in the business rose more than 25% in Cisco's most recent quarter.
Another way to gain exposure to the network-security industry is through iShares North American Tech-Software ETF (IGV) , which has gained 16% in 2014. The fund is home to security companies such as Symantec (SYMC) , which is up 12% in 2014, and Fortinet (FTNT) , which has gained 62%.
IGV data by YCharts
Fortinet is the world's No. 3 security-software vendor. Its third-quarter billings rose 29%, and it estimated revenue for its fourth quarter will be $195 million to $200 million, above analysts' average estimate of $193.4 million, according to Thomson Reuters. Expectations, though, are very high as the company's stock trades at about 172 times this year's earnings estimate of 18 cents a share.