Systems and methods for improving security in universal flash devices regarding purge operations

A system for improving security of a Universal Flash Storage (UFS) device during a purge operation that is intended to delete data stored in one or more physical blocks of flash memory of the UFS device, the system comprising:

• a UFS device comprising control logic configured to output a notification that a purge operation has been interrupted due to issuance of at least one urgent command;
• a host processor comprising processing logic configured to:
• receive the notification;
• store said at least one urgent command in a command queue (CQ) of the host processor;
• perform said at least one urgent command;
• and
• after said at least one urgent command has been performed, cause performance of the purge operation to be resumed in the UFS device.

A computer program embodied on a non-transitory computer-readable medium for execution by a processor for improving security of a Universal Flash Storage (UFS) device during a purge operation that is intended to delete data stored in one or more physical blocks of flash memory of the UFS device, the computer program comprising:

• a first set of computer instructions for execution by control logic of the UFS device for outputting a notification that a purge operation has been interrupted due to issuance of at least one urgent command;
• and
• a second set of computer instructions for execution by processing logic of a host processor for:
• receiving the notification;
• storing said at least one urgent command in a command queue (CQ) of the host processor;
• performing said at least one urgent command;
• and
• after said at least one urgent command has been performed, causing performance of the purge operation to be resumed in the UFS device.

A system for improving security of a Universal Flash Storage (UFS) device during a purge operation that is intended to delete data stored in one or more physical blocks of flash memory of the UFS device, the system comprising:

• means for outputting a notification from a UFS device that a purge operation has been interrupted due to issuance of at least one urgent command;
• means for receiving the notification in a host processor;
• means for storing said at least one urgent command in a command queue (CQ) of the host processor;
• means for performing said at least one urgent command in the host processor;
• and
• means for causing performance of the purge operation to be resumed in the UFS device after said at least one urgent command has been performed.