Starmer did not go into a lot of detail, preferring to let technology companies craft their own plans, but in this case the details matter. Analysts and consultants said that there has been a push for everything to happen on-device, which would avoid any encryption problems; if the inspected data never leaves the device, the encryption protection would stay intact.
But this plan for the process to stay on the device seems highly unlikely for multiple reasons. The first problem is device capabilities and hardware age. Although Apple and Google engineers would be working with the latest devices, much of the UK population is using much older and less capable hardware, analysts said.
Although a 2-, 3- or 4-year-old phone might still be able to handle the additional load, it would likely suffer a dramatic slowdown sufficient to make users decidedly unhappy. That would mean that even if the execution of the data analysis began on the device, it would likely have to be shifted to the cloud for performance reasons. And once it moved into the cloud, the encrypted data problem begins.
Trying to do this scanning on-device in the UK would fail, said Flavio Villanustre, CISO for the LexisNexis Risk Solutions Group. “It will make unusable the majority of devices used in the UK today. It just can’t work on-device.”
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