Storage device, protection method, and electronic apparatus

摘要

According to one embodiment, a storage device includes, when power is supplied to a storage unit, counting of an elapsed time is started. If a command is input from a host device, and the elapsed time from input of a previous command to input of a current command is calculated based on time information clocked by the host device and on a counter value counted until the corresponding command is input. Matching of the time information is determined based on a temporal relation between the adding result of adding the calculated elapsed time to the time information included in the previous command and the time information included in the current command. When the mismatching is determined, data in the storage unit is invalidated.

主权项

1. A storage device comprising:
a storage unit that stores data in a storage area; a reception unit that receives an input of a command, the command including time information representing a current date and time; a calculator that calculates an elapsed time from input of a previous command to input of a current command based on the time information included in the currently input command and on a counter value counted until the corresponding command is input; an adder that adds the elapsed time calculated by the calculator to the time information included in the previously input command; a time information determination unit that determines matching of the time information based on a temporal relation between the adding result of the adder and the time information included in the currently input command; and an authentication unit that performs authentication of the currently input command.