A new study says the iPhone isn't as locked down as it could be for the sake of user convenience — but there are steps that you can take to secure your data. Most important data today is encrypted at rest and end-to-end encrypted when being transferred, like with Apple's iMessage. This means most bad actors cannot get to your most precious data without first unlocking your device. This system prevents all but the most serious criminals and nation states from accessing your data, but there are flaws. Once a criminal has access to a flaw it can be exploited to gain access to sensitive data. Not all flaws lead to full-device unlock but rather expose specific datasets within the encrypted device.