Hewlett-Packard Development Company, L.p.

Diego Rahn Medaglia

Byron Alan Alcorn

Taciano Perez

Craig Walrath

Christian Perone

Joao Claudio Ambrosi

Roberto Bender

Carlos Haas Costa

Anellena Santos

James M Mann

Raphael Gay

Wagston Staehler

Mauricio Nunes Porto

Kimon Berlin

James Robert Waldron

Shane Ward

Carlos Haas

Tadeu Marchese

Dirceu Ramos

Pedro Garcez Monteiro

Taciano Dreckmann Perez

In some examples, securing data on a computing device includes one or more cryptographic operations on at least a portion of data stored in a memory module of the computing device in response to a change of operational state of the system from a first operational state to a second operational state.

Securing data

Examples disclosed herein relate to symmetrically encrypting a master passphrase key. In one implementation, a computing system includes a machine-readable storage medium to store a symmetrically encrypted master passphrase key, an encrypted version of a first passphrase key associated with a second machine-readable storage medium encrypted using the master passphrase key, and an encrypted version of a second passphrase key associated with a third machine-readable storage medium encrypted using the passphrase key. A processing resource may symmetrically encrypt the master passphrase key using an encryption key derived from authentication information and/or decrypt the stored master passphrase key using a decryption key derived from the authentication information.

Symmetrically encrypt a master passphrase key

In some examples, during execution of an application as an application asset is called, an asset map that is stored in a persistent memory device is searched for an asset identifier associated with the application asset. Using this asset identifier, an application asset stored in the persistent memory device is located. The persistent memory device is directly accessed by a processor executing the application. The processor processes the application asset from its location in the persistent memory device.

Asset processing from persistent memory

A computing device that includes a plurality of memory devices and firmware to provide a migration data storage option that reserves a portion of a memory device to store, at least, encrypted metadata describing the physical layout information of the memory devices in preparation for migration of the memory devices.

Migration of memory devices

Examples associated with persistent memory updating are described. One example includes receiving a first store instruction associated with a first page of memory in a persistent memory from an application. The first page is copied to a new page of the persistent memory. A virtual address space of the application is updated to a location of the new page in a read-write mode. The first store instruction is executed on the new page. A file mapping in the persistent memory is updated from a location of the first page to the location of the new page, and the virtual address space for the location of the new page is updated to a read-only mode.

Persistent memory updating

Examples of a system and method for securing data on a computing device are described herein. One or more cryptographic operations are executed on at least a portion of data stored in a memory module of the computing device in response to a change of operational state of the system from a first operational state to a second operational state.

A non-volatile main memory stores state information of at least one program executing in the system, and metadata indicating whether a system is to be resumed to a prior state on a next start. As part of restarting the system from a mode in which power is removed from the system, the system is resumed to the prior state using the state information stored in the non-volatile main memory, in response to the metadata indicating that the system is to be resumed to the prior state.

Resuming a system using state information

A system includes a non-volatile memory to store a page cache that contains pages of data allocated by an operating system, the pages in the page cache being persistent across a power cycle of the system. The page cache is located in a specified region of the non-volatile memory and is to store the pages of data without tagging a memory region.

Page cache in a non-volatile memory

In one example, a computer having a processor and a byte-addressable non-volatile read-write main memory. The memory is partitioned into plural regions, each region having at least one defined operational property. At least one of the regions is a metadata region to store plural data sets. Each data set specifies a location in memory, and the at least one operational property, of a corresponding one of the regions.

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Porto Alegre, Brazil

Diego Rahn Medaglia