A man has been charged after computer systems were hacked at a mobile IT company and an insurance firm.
The charges relate to attacks on systems controlled by Esselar and an attack on Aviva in May 2014.
The 39-year-old man from Guildford has been charged with three counts of unauthorised acts to prevent or hinder access to a computer.
The South East Regional Organised Crime Unit said the attacks had resulted in "significant financial cost".
A spokesman said data had been wiped from hundreds of mobile devices.
The man was charged under the Computer Misuse Act was bailed until 24 February.