The service, which would also be able to install security patches to an idle car, is being tested by luxury automakers Aston Martin and Range Rover, Macquarie analyst Gus Papageorgiou said in a note to clients sent late on Monday.

Auto security is among several areas that BlackBerry is betting will boost its revenue after the Canadian company lost its dominance of the smartphone market to Apple Inc (AAPL.O) and others over the past decade.

John Wall, the head of BlackBerry's QNX division, and company spokeswoman Sarah McKinney both declined to comment.

Matthew Clarke, a spokesman for Aston Martin, said in an email he was not aware of the company testing such a product. Representatives with Range Rover's parent company, Jaguar Land Rover, could not be reached for comment.

The service could be launched as early as next year, generating about US$10 a month per vehicle for BlackBerry, according to Papageorgiou, who has followed BlackBerry for more than 15 years.

Vehicles increasingly rely on dozens of computers that connect to each other as well as the internet, mobile networks and Bluetooth communications systems that make them vulnerable to remote hacks.

"Although a connected, more software-centric automobile offers tremendous advantages to consumers, it also opens the doors to hackers," Papageorgiou wrote in his note.

Automaker interest in cyber security has risen dramatically since 2015, when two hacking experts uncovered vulnerabilities in Fiat Chrysler (FCAU.N) vehicles that led to a U.S. recall of 1.4 million autos.

BlackBerry shares rose 5.3 per cent to close at $13.84 after touching $14.15, the highest since March 2015.