109
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 of f to disable a System certificate.
Caution! When you disable a system CA certificate, the
Turn o ff button changes to Tu rn o n, so you can
enablethe certificate again, if necessar y.
Touch OK to return to the certificate list.
5. Touch Install from device storage, then choose a
certificate and follow the prompts to install encrypted
certificates stored on the USB storage.
Note: You must have installed a memory card containing
encrypted certificates to use this feature.
6. Touch Clear credentials to erase the credential
contents from the device and reset the password.
Note: This setting only appears if you have installed
encrypted certificates.