Security Update Service
To set security update service settings:
1.From a Home screen, touch 
➔ 
Settings ➔ General tab ➔ Security.
2.Touch Security policy updates for these options:
•Automatic updates: Automatically check for changes to the security policy and download any updates to improve security.
•Check for updates: Check for updates manually.
3.Touch Send security reports to send security reports to Samsung via
Credential Storage
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.From a Home screen, touch 
➔ 
Settings ➔ General tab ➔ Security.
2.Touch Storage type to set a storage type for credential contents.
3.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.
4.Touch a CA certificate to examine its details. A scrolling screen displays the details.
Scroll to the bottom of the details screen and touch Turn off to disable a System certificate.
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