Private Disk is a disk encryption application for the Microsoft Windows operating system, developed by Dekart SRL.

It works by creating a virtual drive, the contents of which is encrypted on-the-fly; other software can use the drive as if it were a usual one.

One of Private Disk's key selling points is in its ease of use, which is achieved by hiding complexity from the end user[1] (e.g. data wiping is applied transparently when an encrypted image is deleted.)

This simplicity does however reduce its flexibility in some respects (e.g. it only allows the use of AES-256 encryption.)

Although Private Disk uses a NIST certified implementation of the AES[2] and SHA-256/384/512[3] algorithms, this certification is restricted to a single component of Private Disk; the encryption/hash library used[4][5] and not to Private Disk as a complete system.