Abstract: According to one embodiment, a storage device is configured to store unencrypted user data. The user data is erased according to at least one data erasure mechanism. The storage device comprises a receiver configured to receive an inquiry from a host device, and a transmitter configured to transfer response information indicating the at least one data erasure mechanism to the host device.

Abstract: A storage device includes a storage and a controller configured to execute control of the storage based on a command from a host device. The controller is configured to generate a verifier of data stored in the storage in response to a first command related to the data from the host device, and transmit the verifier of the data to the host device in response to a second command related to the data from the host device.

Abstract: According to one embodiment, a memory system includes a first nonvolatile memory, a second nonvolatile memory and a controller. The first nonvolatile memory includes a first memory element. The second nonvolatile memory includes a second memory element in which data is able to be written only once. The second memory element stores first key information. The controller receives second key information stored in an information processing apparatus, generates a first key using the first key information and the second key information, and generates a second key using at least the first key. The controller encrypts data, which is to be written into the first nonvolatile memory, with the second key, and decrypts data, which is read from the first nonvolatile memory, with the second key.

Abstract: A storage device includes a first memory to which data can be written a plurality of times and a second memory that includes storage elements for which electrical characteristics can be changed only once. The first memory storing first encryption key information and the second memory storing second encryption key information. A controller generated an encryption key using the first encryption key information and the second encryption key information in combination and then encrypts and decrypts data written or read from the first memory. When a host requests an encryption erase, the controller attempts to erase the first encryption key information from the first memory. If the requested erase fails, the controller erases the second encryption key information from the second nonvolatile memory.

Abstract: According to one embodiment, a storage device is configured to store unencrypted user data. The user data is erased according to at least one data erasure mechanism. The storage device comprises a receiver configured to receive an inquiry from a host device, and a transmitter configured to transfer response information indicating the at least one data erasure mechanism to the host device.

Abstract: According to one embodiment, a storage device is configured to store unencrypted user data. The user data is erased according to at least one data erasure mechanism. The storage device comprises a receiver configured to receive an inquiry from a host device, and a transmitter configured to transfer response information indicating the at least one data erasure mechanism to the host device.

Abstract: A storage device includes a first memory to which data can be written a plurality of times and a second memory that includes storage elements for which electrical characteristics can be changed only once. The first memory storing first encryption key information and the second memory storing second encryption key information. A controller generated an encryption key using the first encryption key information and the second encryption key information in combination and then encrypts and decrypts data written or read from the first memory. When a host requests an encryption erase, the controller attempts to erase the first encryption key information from the first memory. If the requested erase fails, the controller erases the second encryption key information from the second nonvolatile memory.

Abstract: According to one embodiment, a memory system includes a first nonvolatile memory, a second nonvolatile memory and a controller. The first nonvolatile memory includes a first memory element. The second nonvolatile memory includes a second memory element in which data is able to be written only once. The second memory element stores first key information. The controller receives second key information stored in an information processing apparatus, generates a first key using the first key information and the second key information, and generates a second key using at least the first key. The controller encrypts data, which is to be written into the first nonvolatile memory, with the second key, and decrypts data, which is read from the first nonvolatile memory, with the second key.

Abstract: An electronic device includes a first device, a second device, and a storage area shared by the first device and the second device when performing mailbox communication between the first device and the second device. When transmitting first data from the first device to the second device via the mailbox communication, the first device stores first data in the storage area. The second device, which has stored therein an identifier of a device permitted to transmit data to the second device via the mailbox communication, obtains an identifier of the first device, and compares the obtained identifier to the identifier stored in the second device to determine whether acquisition of the first data from the storage area is permitted. When the acquisition of the first data from the storage area is determined to be permitted, the second device reads the first data from the storage area.

Abstract: According to one embodiment, a data storage apparatus includes a processor. The processor protects data on a memory by encryption in a first mode or a second mode. The processor stores a first image, a second image and a third image. The first image reproduces a first state which is an initial state where the data storage apparatus is set to neither the first mode nor the second mode. The second image reproduces a second state which is an initial state in the first mode. The third image reproduces a third state which is an initial state in the second mode. The processor is capable of performing a first process to transition from the first state to the second state, and performing a second process to transition from the first state to the third state.

Abstract: A mobile storage device includes first and second memory regions in one or more semiconductor memory devices, a positioning system configured to generate positional information indicating a position of the mobile storage device, and a controller. The controller is configured to allow access to the first memory region and prohibit access to the second memory region when the positional information indicates that the position of the mobile storage device is within a first area, and prohibit access to the first memory region and allow access to the second memory region when the positional information indicates that the position of the memory storage device is within a second area, which is different from and does not overlap with the first area.

Abstract: A storage device includes a storage and a controller configured to execute control of the storage based on a command from a host device. The controller is configured to generate a verifier of data stored in the storage in response to a first command related to the data from the host device, and transmit the verifier of the data to the host device in response to a second command related to the data from the host device.

Abstract: An electronic device includes a first device, a second device, and a storage area shared by the first device and the second device when performing mailbox communication between the first device and the second device. When transmitting first data from the first device to the second device via the mailbox communication, the first device stores first data in the storage area. The second device, which has stored therein an identifier of a device permitted to transmit data to the second device via the mailbox communication, obtains an identifier of the first device, and compares the obtained identifier to the identifier stored in the second device to determine whether acquisition of the first data from the storage area is permitted. When the acquisition of the first data from the storage area is determined to be permitted, the second device reads the first data from the storage area.

Abstract: According to one embodiment, a data storage apparatus includes a processor. The processor protects data on a memory by encryption in a first mode or a second mode. The processor stores a first image, a second image and a third image. The first image reproduces a first state which is an initial state where the data storage apparatus is set to neither the first mode nor the second mode. The second image reproduces a second state which is an initial state in the first mode. The third image reproduces a third state which is an initial state in the second mode. The processor is capable of performing a first process to transition from the first state to the second state, and performing a second process to transition from the first state to the third state.

Abstract: According to one embodiment, a storage device is configured to store unencrypted user data. The user data is erased according to at least one data erasure mechanism. The storage device comprises a receiver configured to receive an inquiry from a host device, and a transmitter configured to transfer response information indicating the at least one data erasure mechanism to the host device.

Abstract: A mobile storage device includes first and second memory regions in one or more semiconductor memory devices, a positioning system configured to generate positional information indicating a position of the mobile storage device, and a controller. The controller is configured to allow access to the first memory region and prohibit access to the second memory region when the positional information indicates that the position of the mobile storage device is within a first area, and prohibit access to the first memory region and allow access to the second memory region when the positional information indicates that the position of the memory storage device is within a second area, which is different from and does not overlap with the first area.

Abstract: An update processing is carried out on a terminal through communication with an external device connected therewith over a network. The terminal includes a processor configured to receive an update request from the external device, the update request including update data and challenge data, and a storage device in which original data to be updated and a private key are stored. The storage device is configured to update the original data using the update data and generate a digital signature of the challenge data using the private key. The processor is further configured to transmit the digital signature of the challenge data to the external device as a completion notification of the update processing.

Abstract: 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.

Abstract: According to one embodiment, a managing method of a storage device including a storage unit capable of being divided into a plurality of storage areas, and being capable of setting an access restriction for each of the storage areas, the method includes setting access restriction information on the access restriction to a desired one of the storage areas, and setting predetermined information which indicates whether the desired storage area is accessible or not and which is capable of being recognized by a host system.

Abstract: A storage apparatus includes a storage unit having plural regions including a first region and a second region, an interface unit configured to receive from an external device an access request for access to the first region, and a controller configured to control the storage unit to store in the second region information indicating that the access request has been received and executed.