How does Apple technology hold up against NSO spyware?

The iPhone maker says it is keeping pace with malware, but the Pegasus project paints a worrying picture

It is one of the technological battles of the 21st century - in which every mobile phone user has a stake.

In one corner, Apple, which has more than a billion active iPhones being used across the world. In the other, companies such as Israel's NSO Group, developing spyware designed to defeat the most sophisticated security and privacy measures.