Abstract: A host device includes a power supply unit configured to supply power to a SoC, a current measurement circuit configured to measure a current from the power supply unit to the SoC, a detection unit configured to detect a power supply glitch in the host device, on the basis of a result of current measurement by the current measurement circuit, and a controller configured to suspend transmission of encrypted command from the host device to the memory device if the detection unit detects a power supply glitch in the host device.

Abstract: A circuitry is configured to calculate a measured average value based on measured current values obtained in a target period for determination, and determine whether a memory device is an authorized or an unauthorized product, based on a comparison result between a measured average value and a reference average value.

Abstract: Upon receiving an erase command and a first logical address, a controller in a first mode sets, as an erasure waiting area, an erasure unit area assigned with a first physical address associated with the first logical address in a first table. The controller in the first mode replaces, in the first table, the first physical address with a physical address assigned to an erasure completion area. The controller in a second mode sets the erasure waiting area as the erasure completion area. Upon receiving a release command to release the second mode at some point in time of data erasure from the erasure waiting area, the controller changes the operation mode to a third mode. The controller operating in the third mode erases un-erased data from the erasure waiting area and changes the operation mode from the third mode to the first mode.

Abstract: A host device includes a power supply unit configured to supply power to a SoC, a current measurement circuit configured to measure a current from the power supply unit to the SoC, a detection unit configured to detect a power supply glitch in the host device, on the basis of a result of current measurement by the current measurement circuit, and a controller configured to suspend transmission of encrypted command from the host device to the memory device if the detection unit detects a power supply glitch in the host device.

Abstract: A circuitry is configured to calculate a measured average value based on measured current values obtained in a target period for determination, and determine whether a memory device is an authorized or an unauthorized product, based on a comparison result between a measured average value and a reference average value.

Abstract: Upon receiving an erase command and a first logical address, a controller in a first mode sets, as an erasure waiting area, an erasure unit area assigned with a first physical address associated with the first logical address in a first table. The controller in the first mode replaces, in the first table, the first physical address with a physical address assigned to an erasure completion area. The controller in a second mode sets the erasure waiting area as the erasure completion area. Upon receiving a release command to release the second mode at some point in time of data erasure from the erasure waiting area, the controller changes the operation mode to a third mode. The controller operating in the third mode erases un-erased data from the erasure waiting area and changes the operation mode from the third mode to the first mode.