BT is offering a hack testing service for the connected car industry called BT Assure Ethical Hacking for Vehicles (AEHV).
The firm said that it is bringing its "expertise" to the growing connected car industry and will help to protect vehicles from cyber threats.
BT AEHV looks at various hacker entry points on cars, buses and passenger/commercial vehicles.
BT said that the mixture of hardware, software and connectivity on such vehicles makes them as open to attack as any other piece of technology.
"Vehicles are now connected devices, confronting manufacturers and suppliers with a whole new world of security challenges," said Hubertus von Roenne, vice president for global industry practices at BT Global Services.
"For example, we have seen cars infected with malware while connected to a power charging station because nobody had expected this would be possible.
"We use the expertise and knowledge of our ethical hacking consultants to identify these vulnerabilities before others do.
"BT has decades of experience in securing connected devices and embedded systems across various industries and we are very proud to now offer that experience to the automotive industry."
BT AEHV will probe access points on a vehicle, including wireless and mobile connections, navigation equipment and entertainment systems.
"The proliferation of these technologies raises concerns about the ability of hackers to gain access to and control of the essential functions and features of those vehicles and for others to use information on drivers' habits for commercial purposes without the drivers' knowledge or consent," explained BT.
"As with all other devices plugged into the Internet of Things, security and integrity of data is of critical importance to prevent unauthorised access or remote hijacking of a vehicle."
The firm added that car firms and insurers that use AEHV can ensure that connected vehicles are as safe as possible.
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