XperiaTM in Business

XperiaTM in Business
Xperia in Business
TM
Security
TM
Read about how Xperia devices manage
security in a corporate IT environment
System security
Secure storage
Network security
Device security
Digital certificates
XperiaTM Z1
XperiaTM Z1 Compact
XperiaTM Z Ultra
This White paper is published by:
Sony Mobile Communications AB,
SE-221 88 Lund, Sweden
www.sonymobile.com
© Sony Mobile Communications AB, 2009-2014.
All rights reserved. You are hereby granted a license
to download and/or print a copy of this document.
Any rights not expressly granted herein are
reserved.
First released version (January 2014)
XperiaTM in Business White paper
This document is published by Sony Mobile
Communications AB, without any warranty*.
Improvements and changes to this text
necessitated by typographical errors, inaccuracies
of current information or improvements to programs
and/or equipment may be made by Sony Mobile
Communications AB at any time and without notice.
Such changes will, however, be incorporated into
new editions of this document. Printed versions are
to be regarded as temporary reference copies only.
*All implied warranties, including without limitation
the implied warranties of merchantability or fitness
for a particular purpose, are excluded. In no event
shall Sony or its licensors be liable for incidental or
consequential damages of any nature, including but
not limited to lost profits or commercial loss, arising
out of the use of the information in this document.
2
Products covered
The services and features described in this document require the following
combination of products and software versions:
XperiaTM Z1
Software version (build number): 14.2.A.0.xxx
XperiaTM Z1 Compact
Software version (build number): 14.2.A.0.xxx
XperiaTM Z Ultra
Software version (build number): 14.2.A.0.xxx
Android version: 4.3.x
Note: xxx in software versions denotes a number 001-999.
To find the software version of a device, select About phone in Settings.
Limitations to services and features
Some of the services and features described in this document might not
be supported in all countries/regions or by all networks and/or service
providers in all areas. Please contact your network operator or service
provider to determine availability of any specific service or feature and
whether additional access or usage fees apply.
Document release date
January 10, 2014
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Security
XperiaTM devices offer a robust security architecture
to secure communications and to protect data
stored on the device. The AndroidTM security model
combines with Sony Mobile enhancements to
provide a stable and secure platform.
Robust architecture with multiple layers
Xperia™ devices from Sony provide a multi-layer security architecture:
• System security - Xperia™ devices offer Linux kernel-level security
from Android™ with Sony Mobile enhancements like Runtime integrity,
HW and SW integrity and Secure Boot Chain.
• Secure storage - Devices can be protected by passwords, PIN codes
and screen unlock patterns. Data on the devices can be encrypted.
• Network security - Transmissions are encrypted and Xperia™
devices have built-in support for industry-standard VPN protocols.
• Device security - Administrators can control the use of certain
features or apps on devices. Data from lost devices can be wiped.
• Digital certificates - Xperia™ devices support digital certificates
to enable authentication and authorisation of users connecting to
corporate networks.
Figure 1: XperiaTM system security
Software
Application sandbox
App + data
Application protection
User partition
Encryption-Enabled File System
System partition
Runtime Integrity Check
System protection
Linux Kernel Security
IPC/ASLR
Hardware & firmware
Trust zone
Hardware Unique Key (HUK)
Sony Mobile Root CA Key
XperiaTM in Business White paper
Security
System security in Xperia™ devices
from Sony:
• SE Linux
• Application sandbox
• Application code signing
• User-based permissions for applications
• Interprocess Communication framework
• Malware scanning of apps
• Address space layout randomiser
• Secure boot chain
• Runtime integrity check
Protected APIs that cannot be
accessed without a user’s explicit
permission:
• Camera functions
• Location data (GPS)
• Bluetooth® functions
• Telephony functions
• SMS/MMS functions
• Network/data connections
System security
The Android™ operating system offers a well-defined security architecture.
As the Android OS is based on the Linux™ operating system, it takes
advantage of the proven Linux kernel-level security model. The OS uses
the Android Application Sandbox, which isolates application data and
code execution from other applications. Since applications cannot interact
with each other, and have limited access to the OS, sensitive information is
protected if the user doesn’t permit access.
Linux kernel security
The Android OS is built upon the Linux kernel. The Linux kernel has been
developed and improved constantly for over 20 years, and it is used and
trusted as a stable and secure kernel by many corporations and security
professionals. Android 4.3 uses Security Enhanced (SE) Linux access
control.
Application sandbox
The Application Sandbox in the OS kernel protects native code and OS
applications. All software above the kernel, including libraries, application
runtime and applications, runs inside the Application Sandbox. The fact
that the Android platform does not allow applications on the device
to interact with each other and limits their access to the OS is key to
enforcing security in Android devices. This system is referred to as the
Android Application Sandbox. The Android OS assigns a unique Linux user
ID to each application. The application then runs as a unique Linux user in
a separate process. This means that if one application tries to read data
or start a process in another application without permission, this action
is stopped by the OS since the instigating application doesn’t have the
appropriate user privileges.
Application code signing
Each application that is used in the Application Sandbox on an Android
device must be signed. Without a legitimate signature, an application
cannot be installed; it will get rejected by either Google Play™ or by the
package installer on the Android device. The certificate of the signed
application defines the user ID that is associated with that application.
Application signing also ensures that one application cannot access
any other application except through well-defined inter-process
communication (IPC). In addition, apps available from Google Play are
automatically scanned for malware.
User-based permissions for applications
Without a user’s explicit permission, an Android application cannot access
any system resources or sensitive APIs, with a few limited exceptions.
Trusted applications can use sensitive APIs, but only after the user has
given permission. Examples of sensitive APIs are camera functions;
location data (GPS); Bluetooth wireless technology; telephony functions;
SMS and MMS functions; and network and data connections. These API
resources are only accessible through the OS. To be able to use a sensitive
API on the device, an application must state which capabilities it needs.
One of the steps when installing an Android application is to judge whether
you want to approve the permissions that the application requests. At
this stage in the installation process you can deny the application access
and interrupt the installation. The permissions are only granted as long
as the application is installed. If the user uninstalls the application, the
permissions are removed.
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Security
Interprocess Communication
The Android OS uses Linux interprocess communication (IPC). It is a welldefined and proven framework for how multiple processes are allowed
to communicate with each other. The Linux IPC mechanism has been
developed and tested for decades.
Malware scanning of apps
An important element in the security shield provided by the Android
platform is the distribution of secure apps. Users can choose to enable
“Verify Apps” and have applications checked for malware prior to
installation. App verification can alert the user if they try to install an app
that might be harmful; if an application is especially bad, it can block
installation.
The server-side scanner, Google Bouncer, controls each app to verify that
its signature does not match that of known malware. When a developer
uploads an app to Google Play, it is automatically scanned. The app is
then scanned at regular intervals.
Address space layout randomiser
The task of the Address Space Layout Randomiser (ASLR) is to make
sure that system applications and libraries are stored in random locations
in the memory. The Android OS uses this randomisation to protect the
device against exploitation of the memory, and against malware getting
installed on the device with the risk of corrupting the memory. ASLR
prevents Return-Oriented Programming (ROP) attacks. Most binaries are
randomised when executed because they are linked with the PIE (Position
Independent Executable) flag. The linkers are randomised in the process
address space. The Android OS has full stack, heap/brk, lib/mmap, linker,
and executable ASLR.
Sony Mobile secure boot chain
Each step of the boot-up and the software update processes contains
components that are cryptographically signed by Sony to ensure integrity.
The processes proceed only after the chain of trust is verified. This
includes the bootloaders, the kernel and the modem firmware. When
a Sony Mobile device is started, its application processor immediately
executes code from a read-only memory known as the Boot ROM. This
unchangeable, permanent code is entered in the chip as part of the
manufacturing process, and is implicitly trusted.
The Boot ROM code contains the Sony Root CA public key, which is used
to verify that the Sony S1 bootloader is signed by Sony before it is allowed
to load and run. This is the first step in the chain of trust where each step
ensures that the next is signed by Sony. When the S1 bootloader finishes
its tasks, it verifies and runs the Android OS, i.e. the Linux kernel. When
you update the software on the Sony Mobile device, either by using a USB
cable and a computer, or by updating directly in the device, over the air, all
updates are signed by Sony.
This means that all software is verified at least twice: once when it is
written to the device, and then every time the device is turned on. This
secure boot chain ensures that the lowest levels of the software are not
tampered with. If one step of this boot process is unable to load or verify
the next step, boot-up is stopped and the device turns off. To be able
to start and use the device again, you have to restore it by updating the
software using a USB cable and one of Sony Mobile’s computer tools, PC
Companion or Sony™ Bridge for Mac.
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Security
Secure email S/MIME
In EAS and the native Email client
• SHA-1/SHA-256*
• Triple-DES, AES 128/192/256-bit*
*
Only SHA-1 and Triple-DES support if S/MIME policies
are enforced through EAS.
S/MIME policies supported by the
Xperia™ Email application:
• Require signed S/MIME messages
• Require encrypted S/MIME messages
• Require signed S/MIME algorithm
• Require encryption S/MIME algorithm
Runtime integrity check
To further improve security in Xperia™ devices, Sony has introduced a
runtime integrity check to detect runtime attacks. The runtime integrity
check is integrated in the kernel and verifies that the mount table has not
been modified. This is to prevent attackers from, for example, storing
executables that remount and modify the system partition of the memory
to make root access permanent. The runtime integrity check also verifies
the integrity of DRM binaries.
Secure storage
Xperia™ devices provide proven methods for protecting sensitive
information. Passwords, PIN codes and screen unlock patterns prevent
unauthorised use. Data on the device can be encrypted, making the data
unreadable to anyone but the intended user. The combined efforts of a
strong password and encryption capabilities guarantee robust protection
of sensitive data stored on Xperia™ devices, and a lost device can be
remotely locked and wiped to protect sensitive content.
Encryption
Encryption can be activated in Xperia™ devices. Xperia™ devices offer
full encryption with 256-bit AES for all user data in the internal memory,
as well as any external SD™ card. This means that any data saved by and
to applications, for example, email messages, email attachments, text
and multimedia messages and contacts, is protected with a hardware
encryption key against unauthorised access. A phone that ends up in the
wrong hands does not risk having its file system broken into, thanks to the
full file system encryption available in Xperia™ devices.
All data is encrypted by an encryption key protected by 256-bit AES, which
uses a key derived from the user password or PIN. If a device gets lost,
confidential corporate information stays safe, and can only be accessed
by knowing the password. To strengthen protection and guard the device
against systematic password guessing attacks, the password is combined
with a random salt and hashed repeatedly with SHA1 using the standard
PBKDF2 algorithm prior to being used to encrypt the file system key.
In addition, Xperia™ devices can defend themselves from dictionary
password attacks by enforcing password complexity based on rules
that your IT department can set. On Xperia™ devices, encryption can be
enforced by an organisation’s IT department through Microsoft® Exchange
ActiveSync® (EAS) or Mobile Device Management (MDM). Encryption can
also be activated on the device by the user.
The email application in Xperia™ devices can use SSL and TLS to encrypt
data sent between the Android OS and corporate services. To further
enhance security in email conversations, the Xperia™ email application
offers S/MIME (Secure/Multipurpose Internet Mail Extensions). This
protocol gives Xperia™ devices the possibility to view and send encrypted
email messages. It can also be used to prevent users from moving email
messages between accounts and from forwarding messages from an
account other than the one that received them.
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Security
The Contacts Sync feature in PC
Companion supports:
• Microsoft Windows Address Book
(Windows XP)
• Windows Contacts (Microsoft Windows
Vista and 7/8)
• Microsoft Outlook 2000, XP (2002),
2003, 2007, 2010/2013 (32bit and 64bit)
• Lotus Notes™ 5.0, 6.0, 6.5, 7.x
(Windows XP)
• Lotus Notes 8.x (Windows XP, Vista and
7/8)
The Calendar Sync feature in PC
Companion supports:
• Microsoft Windows Calendar (Windows
Vista)
• Microsoft Outlook 2000, XP (2002),
2003, 2007, 2010/2013 (32bit and 64bit)
• Lotus Notes 5.0, 6.0, 6.5, 7.x (Windows
XP)
• Lotus Notes™ 8.x (Windows XP, Vista
and 7/8)
The Backup & Restore feature in PC
Companion supports:
• Backup of the call log and contacts
stored locally in the phone memory
• Backup of text messages, bookmarks,
system settings, application settings
and data (availability depending on
application)
• Media files
Data protection
The combination of a strong password and 256-bit AES software
encryption creates a robust encryption key that safeguards corporate data.
This setup hinders data from becoming available to unauthorised users
when the device is locked, and keeps device content secure even if the
device comes under virtual or physical attack. To activate data encryption,
the user simply has to set up password protection from the Settings menu
on the device. A strong password is recommended to ensure effective data
protection. IT departments can enforce strong passwords using Microsoft®
Exchange ActiveSync® or MDM solutions.
Remote wipe
On an Xperia™ device that gets lost, stolen, or otherwise compromised,
the administrator can remotely remove all data from the device and
deactivate it. This remote wipe procedure can be performed using the
Exchange Management Console (Exchange Server 2010) or Exchange
ActiveSync Mobile Administration Web Tool (Exchange Server 2003 or
2007). Users can wipe their devices remotely themselves using Outlook
Web Access if they use Exchange Server 2007. Xperia™ devices can also
be remotely wiped using third party MDM solutions or the ‘my Xperia’
service, even in situations where Exchange server is not used.
Local wipe
Xperia™ devices can be set up to wipe all data and shut down after a
set number of failed login attempts. This ability, known as local wipe,
makes sure that brute force cracking attempts are unsuccessful. The
number of failed attempts allowed before a local wipe occurs can be set
in a configuration profile using MDM, or by using Microsoft® Exchange
ActiveSync® policies enforced over the air.
Secure and local storage of information with software from Sony
Small- and medium-sized companies that don’t want to rely on Microsoft®
Exchange ActiveSync® or MDM solutions for synchronisation and remote
storage of information can use free-of-charge software from Sony Mobile
that is made for Microsoft® Windows® and Mac OS® computers. These
tools can be used to back up and restore data locally on a computer.
There is no need to create accounts or access the Internet.
Tools for Microsoft® Windows® users
PC Companion is a software program developed by Sony Mobile for
computers running Microsoft® Windows®. It offers local backup and
restore functions. When the PC Companion software is installed on a
computer, users simply connect their Xperia™ device to the computer
using a USB cable or a Wi-Fi® connection. All necessary drivers for the
connected Xperia device are installed by PC Companion (Windows XP
32 bit, Windows Vista 32/64-bit, Windows 7/8 32/64-bit). PC Companion
features software update and software repair functionality, enabling
Xperia™ devices to be kept up to date and to run smoothly. Users can also
use the tool to synchronise their device contacts and calendars directly
with computers or local servers, using a USB cable.
PC Companion is available for free download at www.sonymobile.com.
The Backup & Restore function supports the backup of the call log as well
as contacts stored locally on the device memory. Users can also back
up text messages, bookmarks, system settings, application settings and
data (availability depends on the application), and media files. The backup
and restore procedure is performed between the Xperia™ device and the
computer or a local server, that is, using a local connection that does not
require Internet access.
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Security
The Backup & Restore feature in
Bridge for Mac supports:
• Backup of the call log, and contacts
stored locally on the device memory
• Backup of text messages, bookmarks,
system settings, application settings
and data (availability depends on the
application)
Media files
Tools for Mac OS® users
Bridge for Mac is a software program developed by Sony Mobile for Mac
OS® computers. It offers an interface to access Xperia™ devices from a
Mac OS® computer, and includes MTP connectivity as well as a dedicated
file manager. Xperia™ users can also back up and restore data locally to a
Mac. When the Bridge for Mac software is installed, all the user has to do
is connect the Xperia™ device to the Mac using a USB cable. Furthermore,
users can keep their Xperia™ devices up to date and fault-free by using
the software update and software repair features.
Encryption of email and other data in
transmission supported by Xperia™
devices from Sony:
• Secure Sockets Layer (SSL) version 2.0
and 3.0
• Transport Layer Security (TLS) versions
1.0, 1.1, and 1.2
• StartTLS (with IMAP/POP3 accounts)
The Backup & Restore function supports the backup of the call log as well
as contacts stored locally on the device memory. Users can also back up
text messages, bookmarks, system settings, application settings and data
(availability depends on the application), and media files. The backup and
restore procedure is performed between the Xperia™ device and the Mac,
that is, using a local connection that does not require Internet access.
Network security
VPN protocols supported by Xperia™
devices from Sony:
• PPTP with PPP encryption (MPPE)
• L2TP/IPSec PSK/RSA
• IPSec Xauth PSK/RSA
• IPSec Hybrid RSA
• SSL VPN (available through 3rd party
applications)
VPN features supported by Xperia™
devices from Sony:
• API for VPN solutions from
leading vendors certificate-based
authentication support
• Always-On VPN
Xperia™ users within businesses and various organisations expect to
be able to access corporate networks wherever they are. At the same
time, they require that their data is protected over a reliable connection,
with robust user-authorising methods in place. Xperia™ devices based
on the Android OS meet these security requirements whether users are
connected via a mobile network or a Wi-Fi connection.
Using tethering, an Xperia™ device can also be turned into a mobile
hotspot to access the Internet safely from a computer. In the corporate
environment different network access methods and levels can be set to
match corporate IT policies, depending on where the device is used and
which tools are available.
Secure connections
To encrypt communication between Xperia™ devices and corporate
services, Xperia™ devices use the following security standards: Secure
Socket Layer (SSL) 2.0 and 3.0, and Transport Layer Security (TLS v1.0,
v1.1 and v1.2). Internet-based applications, such as the web browser,
Email application and the Calendar, use SSL/TLS to encrypt information
sent over the Internet. There is also support for StartTLS with IMAP/POP3
accounts.
Virtual private network (VPN)
Xperia™ users can connect to a corporate network with VPN access
by using industry-standard protocols and user authentication. Xperia™
devices and the Android OS support several VPN technologies, which
makes the integration of Xperia™ devices into an existing VPN solution
easy. Compatibility with a wide selection of VPN technologies combined
with the Xperia™ device support for user authentication using the X.509
Digital Certificate Standard results in robust protection for all remote
connections. Xperia™ devices support clients using standard Android APIs
from leading VPN solution providers such as Cisco and Juniper.
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Security
Wireless authentication methods
supported by Xperia™ devices from
Sony:
Industry-standard security protocols
• WAPI (for China)
• WEP
• WPA/WPA2 Personal
• WPA/WPA2 Enterprise
802.1x authentication methods
• EAP-SIM
• EAP-AKA
• EAP-TLS
• EAP-TTLS
• EAP-PWD
• PEAPv0 (EAP-MSCHAPv2)
• PEAPv1 (EAP-GTC)
Certificate-based authentication
support
Proxy support
Wi-Fi®
To provide the highest level of protection for data transmissions over a
Wi-Fi connection, Xperia™ devices use WPA2 Enterprise with 128-bit
AES encryption. In addition to the encryption, protection is enhanced by
requiring authentication for access to a wireless network. X.509 digital
client certificates authenticate a user as a valid user before permitting
access to the network. Xperia™ devices also support 802.1x wireless
authentication methods, which means that they can be used with
numerous RADIUS authentication solutions.
To enable easy setup when connecting to Wi-Fi networks, Xperia™
devices support Wi-Fi Protected Setup™. Xperia™ devices can be set
to automatically connect to Wi-Fi networks within range. Once set up,
networks that require login credentials or other information are quickly
accessed via automatic identification and web browser support. Once
login credentials have been entered, they are reapplied when needed
as long as the original login window in the web browser is kept in the
background. In addition, Xperia™ devices support roaming based on
the RSSI (Received Signal Strength Indicator) level, which improves the
Wi-Fi connection and authentication for devices moving between access
points. RSSI-level roaming improves connection reliability by automatically
switching from an access point with a weakening signal to a neighbouring
access point with a stronger signal.
Wi-Fi Protected Setup (WPS)
Xperia™ devices support Wi-Fi connections to internal or external network
resources via a proxy server. To enhance the battery life in Xperia™
devices, users can set Wi-Fi to be turned off when a device is out of range
of known access points. In order to reduce power consumption in idle
mode, Xperia™ devices support WMM® Power Save and IEEE-PS.
Bluetooth™
Xperia™ devices support secure connections to other devices supported
by Bluetooth technology, for example, computers, tablets, phones, printers
or headsets. With support for Bluetooth version 4.0, Xperia™ devices
supply faster data transfer with Enhanced Data Rate (EDR). Bluetooth
version 4.0 also has Secure Simple Pairing (SSP), enabling Public Key
Infrastructure (PKI) encryption that protects against Man-in-the-middle
(MITM) eavesdropping attacks and safeguards the integrity of the
communication.
Device Security
The screen lock combined with a passcode (a PIN or an alphanumeric
password) is the first security barrier in preventing unauthorised users
from gaining access to the entire device. It protects business as well as
personal information. The passcode can be set by the user or enforced
by the IT department. The complexity of the password and other
password-related requirements can be configured and enforced via MDM
or Microsoft® Exchange ActiveSync® policies over the air. In addition to
enforcing passcode policies, the use of device management solutions
with Xperia™ devices enables you to control device policies and device
administration features. For example, you can restrict the use of certain
features or apps on devices, or wipe data from lost devices.
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Security
Passcode policies supported:
• Password recovery enabled
• Require password
• Allow simple password
• Min password length
• Min password complex characters
• Require alphanumeric password
• Max password failed attempts
• Restrict password history
• Password expiration timeout
• Max inactivity time lock
Device policies supported:
• Allow Wi-Fi®
• Allow Bluetooth™
• Allow storage card
• Allow browser
• Allow tethering
• Allow desktop sync
• Application white/black listing
• Require storage card encryption
• Allow roaming
• Require device encryption
• Allow camera
• Allow / Block / Quarantine (ABQ) list
• Unapproved in ROM application list
Device commands supported:
• Add EAS account
• VPN configuration
• Track data usage
• Wipe storage card only
• Get Rooting status
• Prompt new password
• Lock device
• Wipe device
• Locate device
• Sound an alert
Passcode policies
IT administrators can choose from a wide range of passcode requirements
when deploying Xperia™ devices in a corporate environment. In addition
to requiring that an Xperia™ device is supplied with a passcode, you can
enforce what length a PIN or a password must have through the Minimum
password length policy. By using the Restrict password history policy,
you can force users to create a new passcode that is different from
their current passcode or a recently used passcode. This policy is often
combined with the Password expiration timeout policy which forces users
to update their passcode after a specified time period.
Device policies and administration
For an even higher level of security, you can add policies restricting the
use of certain features on a device, or determine which features should
be disabled or enabled. Security policies developed by Sony Mobile
for Xperia™ devices include encryption of the external SD card. This is
an addition to the Android OS support for device policies. You can, for
instance, require that the storage of the device has to be encrypted, or that
the camera should be disabled.
Xperia™ devices also support application blacklists and whitelists. This
feature allows 3rd party MDMs (Mobile Device Management) to add and
remove applications to the lists. Applications on the blacklist are disabled,
and if they are started the user will get a notification that says that the
application is blocked due to device policies.
Within the device administration area, the Android OS provides a toolbox
of administration features, ranging from the possibility to remotely lock
a device and wipe its content (including the content on the external SD
card) all the way through to remotely installing applications and updating
installed applications.
Enforcing policies
By using device management solutions, an IT administrator can reach the
whole fleet of Xperia™ devices used in a company. By managing devices
from one central point, you can guarantee a high level of security by being
able to enforce and monitor a wide range of parameters in the devices that
access your corporate network and its sensitive data. You can achieve a
comprehensive security setup as all devices in your network follow the
same set of rules. You can configure different rule sets based on different
user types.
When using Xperia™ devices, you can take advantage of the policies
added by Sony Mobile as well as standard policies supported by the
Android OS. You can remotely configure password settings, and push out
policies to Xperia™ devices over the air using MDM solutions that support
standard Android APIs. If the Xperia™ device uses a Microsoft Exchange
account, you can push Microsoft® Exchange ActiveSync® policies over a
mobile or Wi-Fi network.
Digital certificates
Xperia™ devices support digital certificates, providing businesses and
organisations with a way to authenticate and authorise users to securely
and efficiently transfer information to and from corporate networks. In
addition, digital certificates enable the encryption of data exchanged
between servers and permitted devices. The security is built around the
Public Key Infrastructure (PKI) framework, which uses trusted encryption
keys to protect transmitted data.
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Security
Client and CA (Certificate Authority)
certificates:
• X.509 standard based
• DER encoded (*.crt, *.cer)
• PKCS#12 key store files (*.p12, *.pfx)
• Stored in trusted credentials storage
• Install from several sources:
• SD card
• Email
• Web browser
• MDM provider
Certificate-based authentication
support in multiple apps
• Exchange ActiveSync (EAS)
• Wi-Fi
• VPN
• Web browser
• Other 3rd party apps
Certificate Pinning
• Protection against compromised
Certificate Authorities
Certificates are issued and approved by a Certificate Authority (CA). The
CA could be an independent external company which is recognised and
mutually trusted, or an internal organisation within your business. Digital
certificates can also authenticate a client or a device interacting with a
network, attesting that the device really is the device that it claims to be.
Moreover, certificates are used to verify the sender of, for example, email
messages or documents, with the option of making sure the content is
encrypted.
Server certificates
Xperia™ devices support client-server communication using Transport
Layer Security (TLS) or Secure Socket Layer (SSL). Authentication with
server certificates follows the X.509 digital certificate standard. Server
certificates are stored in the internal credential storage. Server certificates
enable encrypted communication between the client and the server.
Client certificates
You can use client certificates as an efficient alternative to authentication
by requiring a user name and password, or a token. EAS servers, VPN
gateways or Wi-Fi access points can identify Xperia™ devices using client
certificates before giving them access to a corporate network. In this
setup, users must obtain and store the certificate on the Xperia™ device
before they can configure the device to use a VPN gateway or a corporate
server. Client certificates may also be used to enable secure messaging
using S/MIME. Client certificates are stored in the secure credential
storage and protected by a user-selected password.
Installing or removing digital certificates
When opened, a PKCS#12 keystore file triggers the KeyChain installer,
which installs a bundled private key/certificate pair. IT administrators can
distribute certificates by making the required files available for download
from a secure server area to the SD card. The user can then install the files
on the device from the SD card.
Certificates can also be distributed via email, since the email application
allows the installation of certificate files directly from an attachment. In
such cases, you can simply attach the files in an email and then let the
user install the files by opening them. Alternatively, several browsers
support the installation of digital certificates. So users can download the
certificate files from a secure corporate website to the Xperia™ device.
You can also distribute digital certificates over the air through an existing
MDM solution. You can remove an installed certificate via the Settings
menu in the Xperia™ device. Alternatively, you may use an MDM server to
check and remove certificates from a device over the air.
Certificate Pinning
Xperia™ devices support certificate pinning. Pinned domains will receive
a certificate validation failure if the certificate does not chain to a set
of expected certificates. This protects against possible compromise of
Certificate Authorities.
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Trademarks and acknowledgements
All product and company names mentioned herein are the trademarks or
registered trademarks of their respective owners. Any rights not expressly
granted herein are reserved. All other trademarks are property of their
respective owners.
Visit www.sonymobile.com for more information.
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