Changing Your Settings 133Trusted CredentialsIf a certificate authority (CA) certificate gets compromised orfor some other reason you do not trust it, you can disable orremove it.1. From the Home screen, tap ➔ Settings ➔Security.2. Tap Trusted credentials.The trusted credentials screen has two tabs:• System: Displays CA certificates that are permanently installedin the ROM of your device.• User: Displays any CA certificates that you installed, forexample, in the process of installing a client certificate.3. Tap a CA certificate to examine its details.A scrolling screen displays the details.4. Scroll to the bottom of the details screen and tapDisable to disable a System certificate or Remove toremove a User certificate.Caution! When you disable a system CA certificate, the Disablebutton changes to Enable, so you can enable thecertificate again, if necessary. When you remove auser-installed CA certificate, it is permanentlydeleted and must be re-installed, if needed.5. Tap OK to return to the certificate list.When enabled, a check mark appears in the check box.Install from device storageInstall encrypted certificates from an installed memory card.Note: You must have installed a memory card containingencrypted certificates to use this feature.1. From the Home screen, tap ➔ Settings ➔Security.2. Tap Install from device storage, then choose acertificate and follow the prompts to install.
