BestCrypt Volume Encryption software provides transparent encryption of all the data stored on fixed and removable disk devices.

BestCrypt Volume Encryption software opens a new class of Volume Encryption products. With the software users can encrypt old MS-DOS style disk partitions as well as modern volumes residing on a number of physical disk devices, for example Spanned, Striped, Mirrored or RAID-5 volumes.

The idea of Whole Disk Encryption software is rather simple. Such software works with physical hard drive and is intended to encrypt all the sectors on the hard drive. In real life software usually does not encrypt first sectors (usually 63 sectors) reserved for future use (the latest versions of Windows can use these sectors). Whole Disk Encryption software encrypts every hard drive on computer independently, often with different encryption keys.

Partition Encryption software usually works on basic disks. It is a more flexible way of encrypting data, because it allows the user to open (enter password and get access to) different encrypted partitions independently. Note that if a partition occupies the whole hard drive (as partition C: on the Figure 2 below), Partition Encryption works for the user as Whole Disk Encryption.

Since Windows NT time, the Windows operating system allows the user to create multi-partition volumes. Windows can combine several partitions (even stored on different physical hard drives) into a large single “partition” called Volume. It is a significant step forward, at least because such volumes allow the user to:

• create a larger single logical unit to store files (spanned volumes);
• get more reliable way to store sensitive data (mirrored and RAID-5 volumes);
• get higher overall performance of IO operations (striped and RAID-5 volumes).

We call encryption software working with volumes Volume Encryption software. Note that if Volume Encryption software encrypts a volume consisting of a single partition, for the user it will give the same result as Partition Encryption software. If a single partition occupies the whole hard drive, Volume Encryption will be equal both to Whole Disk Encryption and Partition Encryption. Encrypting of basic partition C: on Figure 3 below illustrates that.

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