Intelligence agents in the UK say they are dealing with at least one ransomware attack every day.
Ransomware attacks are when hackers steal data, lock computer systems and demand a ransom.
The National Cyber Security Centre is working with Marks & Spencer after its IT system was shut down earlier this year.
The BBC’s Panorama programme has also been told that 2025 is likely to be the worst year on record for ransomware attacks.
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