Add HTML documentation.

author: Mounir IDRASSI <mounir.idrassi@idrix.fr> 2017-05-13 17:34:16 +0200
committer: Mounir IDRASSI <mounir.idrassi@idrix.fr> 2017-05-15 01:16:36 +0200
commit: 5e1fffa87191c3566bcbe20c6e8d29d5f21651d5 (patch)
tree: 1d3d034ea91d11813459c5cdfe6630b384f3bbfc /doc/html/Hardware Acceleration.html
parent: 76167ceba3f0a3ec91174620283f451815daa288 (diff)
download: VeraCrypt-5e1fffa87191c3566bcbe20c6e8d29d5f21651d5.tar.gz
VeraCrypt-5e1fffa87191c3566bcbe20c6e8d29d5f21651d5.zip
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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+<meta http-equiv="content-type" content="text/html; charset=utf-8" />
+<title>VeraCrypt - Free Open source disk encryption with strong security for the Paranoid</title>
+<meta name="description" content="VeraCrypt is free open-source disk encryption software for Windows, Mac OS X and Linux. In case an attacker forces you to reveal the password, VeraCrypt provides plausible deniability. In contrast to file encryption, data encryption performed by VeraCrypt is real-time (on-the-fly), automatic, transparent, needs very little memory, and does not involve temporary unencrypted files."/>
+<meta name="keywords" content="encryption, security"/>
+<link href="styles.css" rel="stylesheet" type="text/css" />
+</head>
+<body>
+
+<div>                      
+<a href="https://www.veracrypt.fr/en/Home.html"><img src="VeraCrypt128x128.png" alt="VeraCrypt"/></a>
+</div>
+
+<div id="menu">
+	<ul>
+	  <li><a href="Home.html">Home</a></li>
+	  <li><a href="/code/">Source Code</a></li>
+	  <li><a href="Downloads.html">Downloads</a></li>
+	  <li><a class="active" href="Documentation.html">Documentation</a></li>
+	  <li><a href="Donation.html">Donate</a></li>
+	  <li><a href="https://sourceforge.net/p/veracrypt/discussion/" target="_blank">Forums</a></li>
+	</ul>
+</div>
+
+<div>
+<p>
+<a href="Documentation.html">Documentation</a>           
+<img src="arrow_right.gif" alt=">>" style="margin-top: 5px">
+<a href="Hardware%20Acceleration.html">Hardware Acceleration</a>
+</p></div>
+
+<div class="wikidoc">
+<h1>Hardware Acceleration</h1>
+<div style="text-align:left; margin-top:19px; margin-bottom:19px; padding-top:0px; padding-bottom:0px">
+Some processors (CPUs) support hardware-accelerated <a href="AES.html" style="text-align:left; color:#0080c0; text-decoration:none.html">
+AES</a> encryption,* which is typically 4-8 times faster than encryption performed by the purely software implementation on the same processors.</div>
+<div style="text-align:left; margin-top:19px; margin-bottom:19px; padding-top:0px; padding-bottom:0px">
+By default, VeraCrypt uses hardware-accelerated AES on computers that have a processor where the Intel AES-NI instructions are available. Specifically, VeraCrypt uses the AES-NI instructions that perform so-called AES rounds (i.e. the main portions of the AES
+ algorithm).** VeraCrypt does not use any of the AES-NI instructions that perform key generation.</div>
+<div style="text-align:left; margin-top:19px; margin-bottom:19px; padding-top:0px; padding-bottom:0px">
+Note: By default, VeraCrypt uses hardware-accelerated AES also when an encrypted Windows system is booting or resuming from hibernation (provided that the processor supports the Intel AES-NI instructions).</div>
+<div style="text-align:left; margin-top:19px; margin-bottom:19px; padding-top:0px; padding-bottom:0px">
+To find out whether VeraCrypt can use hardware-accelerated AES on your computer, select
+<em style="text-align:left">Settings</em> &gt; <em style="text-align:left">Performance/</em><em>Driver Configuration</em> and check the field labeled '<em style="text-align:left">Processor (CPU) in this computer supports hardware acceleration for AES</em>'.</div>
+<div style="text-align:left; margin-top:19px; margin-bottom:19px; padding-top:0px; padding-bottom:0px">
+To find out whether a processor you want to purchase supports the Intel AES-NI instructions (also called &quot;AES New Instructions&quot;), which VeraCrypt uses for hardware-accelerated AES, please check the documentation for the processor or contact the vendor/manufacturer.
+ Alternatively, click <a href="http://ark.intel.com/search/advanced/?AESTech=true" style="text-align:left; color:#0080c0; text-decoration:none">
+here</a> to view an official list of Intel processors that support the AES-NI instructions. However, note that some Intel processors, which the Intel website lists as AES-NI-supporting, actually support the AES-NI instructions only with a Processor Configuration
+ update (for example, i7-2630/2635QM, i7-2670/2675QM, i5-2430/2435M, i5-2410/2415M). In such cases, you should contact the manufacturer of the motherboard/computer for a BIOS update that includes the latest Processor Configuration update for the processor.</div>
+<div style="text-align:left; margin-top:19px; margin-bottom:19px; padding-top:0px; padding-bottom:0px">
+If you want to disable hardware acceleration of AES (e.g. because you want VeraCrypt to use only a fully open-source implementation of AES), you can do so by selecting<em style="text-align:left"> Settings</em> &gt;
+<em style="text-align:left">Performance and Driver Options </em>and disabling the option '<em style="text-align:left">Accelerate AES encryption/decryption by using the AES instructions of the processor</em>'. Note that when this setting is changed, the operating
+ system needs to be restarted to ensure that all VeraCrypt components internally perform the requested change of mode. Also note that when you create a VeraCrypt Rescue Disk, the state of this option is written to the Rescue Disk and used whenever you boot
+ from it (affecting the pre-boot and initial boot phase). To create a new VeraCrypt Rescue Disk, select
+<em style="text-align:left">System</em> &gt; <em style="text-align:left">Create Rescue Disk</em>.</div>
+<p>&nbsp;</p>
+<hr align="left" size="1" width="189" style="text-align:left; height:0px; border-width:0px 1px 1px; border-style:solid; border-color:#000000">
+<p><span style="text-align:left; font-size:10px; line-height:12px">* In this chapter, the word 'encryption' also refers to decryption.</span><br style="text-align:left">
+<span style="text-align:left; font-size:10px; line-height:12px">** Those instructions are
+<em style="text-align:left">AESENC</em>, <em style="text-align:left">AESENCLAST</em>,
+<em style="text-align:left">AESDEC</em>, and <em style="text-align:left">AESDECLAST</em> and they perform the following AES transformations:
+<em style="text-align:left">ShiftRows</em>, <em style="text-align:left">SubBytes</em>,
+<em style="text-align:left">MixColumns</em>, <em style="text-align:left">InvShiftRows</em>,
+<em style="text-align:left">InvSubBytes</em>, <em style="text-align:left">InvMixColumns</em>, and
+<em style="text-align:left">AddRoundKey</em> (for more details about these transformations, see [3])</span><span style="text-align:left; font-size:10px; line-height:12px">.</span></p>
+</div><div class="ClearBoth"></div></body></html>
+\ No newline at end of file
author	Mounir IDRASSI <mounir.idrassi@idrix.fr>	2017-05-13 17:34:16 +0200
committer	Mounir IDRASSI <mounir.idrassi@idrix.fr>	2017-05-15 01:16:36 +0200
commit	5e1fffa87191c3566bcbe20c6e8d29d5f21651d5 (patch)
tree	1d3d034ea91d11813459c5cdfe6630b384f3bbfc /doc/html/Hardware Acceleration.html
parent	76167ceba3f0a3ec91174620283f451815daa288 (diff)
download	VeraCrypt-5e1fffa87191c3566bcbe20c6e8d29d5f21651d5.tar.gz VeraCrypt-5e1fffa87191c3566bcbe20c6e8d29d5f21651d5.zip