Israeli startup Karamba Security today announced a new product for securing the electronic control units (ECUs) of connected and self-driving vehicles that it said could have prevented a recent Tesla hack.

Karamba’s Carwall software uses a vehicle’s factory software settings to discover noncompliant code in a car’s ECUs and automatically creates security policies in real time to block the code.

Karamba also announced a $2.5 million second series funding round from venture capital firm Fontinalis Partners.

A modern car has dozens of computers, known as electronic control units (ECUs) with as much as 100 million lines of code. For every 1,000 lines of code, there are as many as 15 bugs that are potential doors for would-be hackers.

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