While there is a lot to look forward to with Windows Phone 8, some of the changes may not be as noticeable but no less important. Windows Phone 8 will have a number of significant changes under the hood to bolster the security of the platform.
Windows Phone 8 will have device encryption throughout the entire device including the OS and its applications. Designed along the same lines as Windows 7 PCs, encryption kicks in as soon as you power up the device. This system, based off of Bitlocker (but adapted for Windows Phone) was something first reported on back in February as an early rumor.
BitLocker is a logical volume encryption system that is present in Windows 7 and will be present in Windows 8. BitLocker is designed to protect data by providing encryption for entire volumes or drives within a computer to protect the integrity of a trusted boot path. The main difference between the PC version of encryption and what we will see on Windows Phone 8 is that the encryption keys are not manageable on our Windows Phone as they are on desktops or laptops.