iOS Hardening Configuration Guide
The iOS Hardening Configuration Guide issued in March 2012 by the Australian Defence Signals Directorate (DSD) for iPod Touch, iPhone and iPad devices running iOS 5.1, is available from the DSD website. The NCSC concurs with the recommendations made in this guide and supports its use. A consumer guide detailing the findings and recommendations resulting from the DSD evaluation of iOS 5.1 is also available.
Any queries regarding either of these publications should be directed to the NCSC.