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Device Administration
To add or remove device administrators:
1. Touch
Settings
➔
Security
.
2. Touch
Device administrators
.
Enable or disable installation of non-Google Play
applications.
1. Touch
Settings
➔
Security
.
2. Touch
Unknown sources.
An informational pop-up displays.
3. Read the message and touch
OK
to allow installation of
non-Google Play applications.
When enabled, a check mark
appears in the
check box.
Warning!
Enabling this option causes your tablet and personal
data to be more vulnerable to attack by applications
from unknown sources.
4. To block or warn before installing apps that may cause
harm, touch
Verify apps
.
Credential Storage
Trusted Credentials
If a certificate authority (CA) certificate gets compromised or
for some other reason you do not trust it, you can disable or
remove it.
1. Touch
Settings
➔
Security
.
2. Touch
Trusted credentials
.
The trusted credentials screen has two tabs:
• System
: Displays CA certificates that are permanently installed
in the ROM of your device.
•User
: Displays any CA certificates that you installed, for
example, in the process of installing a client certificate.
3. Touch a CA certificate to examine its details.
A scrolling screen displays the details.
4. Scroll to the bottom of the details screen and touch
Turn off
to disable a System certificate.
Caution!
When you disable a system CA certificate, the
Turn off
button changes to
Turn on
, so you can enable
the certificate again, if necessary.