181Settings Lock Screen and SecurityCredential StorageManage your security certificates. If a certificateauthority (CA) certificate gets compromised or forsome other reason you do not trust it, you can disableor remove it.1. From a Home screen, tap Apps > Settings.2. Tap Lock screen and security > Other securitysettings for the following Credential storageoptions:• Storage type: Select a storage location forcredential contents.• View security certificates: Display certificatesin your device’s ROM and other certificatesyou have installed.• User certificates: View user certificates.• Install from device storage: Install a newcertificate from storage.• Clear credentials: Erase the credentialcontents from the device and reset thepassword.Advanced Security SettingsUse these options to configure advanced securitysettings.1. From a Home screen, tap Apps > Settings.2. Tap Lock screen and security > Other securitysettings for the following advanced options:• Trust agents: Perform selected actions whentrusted devices are connected.- To view Trust agents, set up a securedscreen lock (Password, PIN, Pattern, orFingerprints). For more information, see“Set a Screen Lock” on page 175.• Pin windows: Pin an app on your devicescreen, preventing access to other features ofyour device.• Usage data access: View the applications thatcan access your device’s usage history.