The UK 's National Health Service reported more than 11 million cyber attacks to its email system in the past three years , according to NHS Digital . Internet protocol or domain name attacks accounted for more than six million of the attacks , while spam was responsible for 3.6 million attacks and 852,000 attacks were reported as anti - trust . The highest ranking attacks are IP or domain reputation attacks (more than six million), followed by spam (3.6 million). Andy Heather from Centrify said hospitals should ensure all individuals who access its IT systems have been verified to do so .
The UK 's National Health Service reported more than 11 million cyber attacks to its email system in the past three years , according to NHS Digital . Internet protocol or domain name attacks accounted for more than six million of the attacks , while spam was responsible for 3.6 million attacks and 852,000 attacks were reported as anti - trust . Andy Heather from Centrify said hospitals should ensure all individuals who access its IT systems have been verified to do so .