According to one embodiment, an information processing device ranks one or more security measures technologies to be ranked. The information processing device includes processing circuitry configured to operate as an influence information obtaining unit, a requirements information obtaining unit and a ranking unit. The influence information obtaining unit obtains influence information indicating correspondence between the one or more security measures technologies and an influence on a system when each of the one or more security measures technologies is introduced into the system. The requirements information obtaining unit obtains requirements information indicating system requirements of the system. The ranking unit ranks the one or more security measures technologies based on a degree of satisfaction of the system requirements indicated in the requirements information, using the requirements information and the influence information.