Apple iOS 4 Security Evaluation

Bottom Line6-character alphanumeric passcodes are probably sufficientUnless attacker can extract UID Key from hardwareLack of thorough Data Protection coverage is a serious issueWait to see what iOS 5 coversAudit third-party apps for Data Protection usageiPad2 and later have no public Boot ROM exploits, makingattacks on lost devices much more difficult and unlikely