compromised

But it is often impossible to restore compromised services without the hackers' key – meaning the only way around it is to either use back-ups or install new systems and start again.

Some of the product’s features, such as its safe browsing mode or a system that notifies users if their password has been compromised, rely on shared Google infrastructure not solely within Chrome’s purview, she said.

"I felt like I compromised but, because of that, I was never taking no for an answer again."

If our devices are compromised, so is our safety.

It said a "rigorous process" had already been introduced to prevent its QR codes being compromised, with signs inspected and codes checked every day.