This level caries on from Basic Security (so complete that first) and covers reducing unauthorised device discovery and minimising information leakage…

Disable Bluetooth - reduces device discovery…

• Settings
• Bluetooth
• Turn Bluetooth Off

Disabling Bluetooth when not needed prevents unauthorised device discovery. Apple Pencil, Apple Watch, AirPods and HomePod all use Bluetooth and so do many other accessories, so this isn't really a permanent option…


Disable Personal Hotspot - reduces device discovery…

• Settings
• Personal Hotspot
• Turn Personal Hotspot Off

Disabling Personal Hotspot when not needed prevents unauthorised device discovery.


Disable Ask to Join Networks - reduces device discovery…

• Settings
• Wi-Fi
• Turn Ask to Join Networks Off

Disabling Ask to Join Networks reduces the risk of joining an untrusted network and hence unauthorised device discovery.


Disable Today View on Lock Screen - reduce information leakage…

• Settings
• Touch ID & Passcode
• Enter passcode
• Turn Today Off

Optionally leave Today View on and tune what gets displayed:

• Unlock the device and swipe right to access Today view
• Scroll to the bottom of the view
• Select Edit
• Only enable non-confidential Apps (weather, news etc)
• Disable all other Apps especially where message confidentiality is important

Disabling Today view on the Lock Screen reduces unauthorised access to personal information such as reminders and appointments.


Disable Notifications View on Lock Screen - reduce information leakage…

• Settings
• Touch ID & Passcode
• Enter passcode
• Turn Recent Notifications Off

Also

• Settings
• Notifications
• Set Show Previews to When Unlocked (or Never)

Disabling Notifications View on the Lock Screen reduces unauthorised access to personal information such as missed calls, appointments and anything else that has Show in Notification Centre turned on.


Disable Control Centre from Lock Screen - reduces device discovery and access…

• Settings
• Touch ID & Passcode
• Enter passcode
• Turn Control Centre Off

Disabling Control Centre Access on Lock Screen reduces the risk of unauthorised changes to device settings and helps mitigate lock screen bypass exploits.


Disable Reply with Message from Lock Screen - reduces information leakage…

• Settings
• Touch ID & Passcode
• Enter passcode
• Turn Reply with Message Off

Disabling Reply with Message Access on Lock Screen reduces the risk of unauthorised use.


Disable Home Control from Lock Screen - reduces device discovery and access…

• Settings
• Touch ID & Passcode
• Enter passcode
• Turn Home Control Off

Disabling Home Control Access on Lock Screen reduces the risk of unauthorised access.


Disable Wallet from Lock Screen - reduces information leakage…

• Settings
• Touch ID & Passcode
• Enter passcode
• Turn Wallet Off

Disabling Wallet Access on Lock Screen reduces the risk of unauthorised transactions.


Disable Return Missed Calls from Lock Screen - reduces information leakage…

• Settings
• Touch ID & Passcode
• Enter passcode
• Turn Return Missed Calls Off

Disabling Return Missed Calls Access on Lock Screen reduces the risk of unauthorised use.


Disable USB Accessories from Lock Screen - reduces unauthorised access…

• Settings
• Touch ID & Passcode
• Enter passcode
• Turn USB Accessories Off

Disabling USB Accessories Access on Lock Screen reduces the risk of unauthorised access.


Disable Show on Lock Screen for Sensitive Apps - reduce information leakage…

• Settings
• Notifications
• Select an App
• Turn Show on Lock Screen Off

Disabling Show on Lock Screen reduces unauthorised viewing of personal information. Consider any App where message confidentiality is important and repeat this step for each one (Calendar, FaceTime, Mail, Messages and Phone for example).


Disable Access to Siri and Voice Control from the Home Button - reduce information leakage…

• Settings
• General
• Accessibility
• Scroll down to and select Home Button
• Under the section ’press and hold to speak’ select Off

Disabling the home button access to Siri and Voice Control will help stop accidental or unauthorised access.


Disable access to Siri when locked - reduce information leakage…

If Siri is enabled you can restrict access to only be available when unlocked.

• Settings
• Touch ID & Passcode
• Enter passcode
• Scroll down to the section ’allow access when locked’ find Siri
• Turn Siri Off

Disabling Siri when locked will help stop accidental or unauthorised access.


Disable Siri - reduce information leakage…

• Settings
• Siri & Search
• Turn Listen for “Hey Siri” Off
• Turn Press Home for Siri Off

Disabling Siri will help stop accidental or unauthorised information leakage.


Disable Share Analytics - reduce information leakage…

• Settings
• Privacy
• Analytics
• Turn Share iPhone (or iPhone & Watch or iPad) Analytics Off
• Turn Share iCloud Analytics Off

Disabling Share Analytics will help maintain privacy.


Enable Limit Ad Tracking - reduce information leakage…

• Settings
• Privacy
• Advertising
• Turn Limit Ad Tracking On

Enabling Limit Ad Tracking will help maintain privacy and stop targeted ads.


Disable Location-Based Apple Ads - reduce information leakage…

• Settings
• Privacy
• Location Services
• System Services
• Turn Location-Based Apple Ads Off
• Turn Location-Based Suggestions Off

Disabling Location-Based Apple Ads and Location-Based Suggestions will help maintain privacy and stop targeted ads from Apple.


Disable Significant Locations - reduce information leakage…

• Settings
• Privacy
• Location Services
• System Services
• Significant Locations (enter passcode)
• Turn Significant Locations Off

Disabling Significant Locations will help maintain privacy by not allowing the device learn places of significance.


Disable iPhone Analytics - reduce information leakage…

• Settings
• Privacy
• Location Services
• System Services
• Turn iPhone (or iPad) Analytics Off

Disabling iPhone Analytics will help maintain privacy.

Notes:

• The settings above are available in iOS 11, they may or may not be available in other versions.
• Some of these settings may reduce functionality, adjust to suite specific requirements…

Want More - move on to Advanced Security…