The UK is to create a new cyber unit to help defend national security, the defence secretary has announced.
The Ministry of Defence is set to recruit hundreds of reservists as computer experts to work alongside regular forces in the creation of the new Joint Cyber Reserve Unit.
The new unit will also, if necessary, launch strikes in cyber space, Mr Hammond said.
Recruiting for reservists to join the unit will start next month.
The role of the unit is to protect computer networks and safeguard vital data.
In a statement, the Ministry of Defence (MoD) said the "creation of the "Joint Cyber Unit (Reserve) will allow it to draw on individuals' talent, skills and expertise gained from their civilian experience to meet these threats".