Richard Neele (40) has been sentenced to 18 months in prison for hacking into 900 phones of insurance company Aviva.
Neele deleted the data on all the 900 smart phones making the company lose out on 5,00,000 pounds onf business.
Neele was a director at Esselar. a company which had been contracted by Aviva to manage its security network.
Neele has said that he carried out hte attacks becauys eof falling out with his colleagues.
He hacked the system at Aviva in May 2014 when Esselar was giving a security demonstration to Aviva.