Patent ID: 8756419

Claim:
A computer-implemented method for erasing user data stored in a file system, the method causing a computing device to perform steps comprising: receiving, by the computing device, through a wireless data connection, erasure instructions from a master device, wherein the master device generates the erasure instructions in response to the computing device being reported as lost or stolen; erasing, by the computing device, in response to receiving the erasure instructions, all key sets containing encryption keys loaded in a volatile memory on the computing device and all key sets containing encryption keys stored in a file system on the computing device, wherein the file system on the computing device uses file-level data protection; sending, by the computing device, in response to the erasing, incremental confirmations of at least one step of execution of the erasure instructions to the master device through the wireless data connection; erasing and rebuilding, subsequent to the erasing, at least part of the file system associated with user data; creating, subsequent to the erasing and rebuilding, a new default key set containing class encryption keys, wherein each class encryption key is encrypted using a unique code specific to the computing device, and the unique code is only usable by the computing device; and rebooting the computing device.