Private Disk

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 (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.)



PGP Virtual Disk is an on-the-fly encryption (OTFE) system that allows one to create a virtual encrypted disk within a file.

Older versions for Windows NT were freeware (for example, bundled with PGP v6.0.2i; and with some of the CKT builds of PGP). These are still available for download, but no longer maintained. Today, PGP Virtual Disk is available as part of the PGP Desktop product family, running on Windows 2000/XP/Vista, and Mac OS X.



Scramdisk is a free On-the-fly encryption program for Windows 95, Windows 98, and Windows Me. A non-free version was also available for Windows NT.

The original Scramdisk is no longer maintained; its author, Shaun Hollingworth, joined Paul Le Roux (the author of E4M) to produce Scramdisk’s commercial successor, DriveCrypt. Although Scramdisk’s source code is still available, it was only released and licenced for private study and not for further development.

There is a new project called ScramDisk 4 Linux which provides access to Scramdisk and TrueCrypt containers.



TrueCrypt is a free software application used for on-the-fly encryption (OTFE). It can create a virtual encrypted disk within a file or encrypt a partition or (under Microsoft Windows except Windows 2000) the entire storage device (pre-boot authentication).


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Comparison of disk encryption software

Disk encryption software is computer security software that is designed to protect the confidentiality of the data stored on a computer disk by utilizing a technique called disk encryption. Compared to access restrictions commonly enforced by an OS, this technique allows data be to be protected even when the OS is not active, for example, if data are read directly from the hardware. Such software encrypts data stored on a computer’s mass storage and transparently decrypts the information when an authorized user requests it: no special action by the user (except supplying a password or passphrase at the beginning of a session) is required. Some also provide plausible deniability with deniable encryption techniques.

What are the different disk encryption software available ?

DISK Protect TrueCrypt n-Crypt Pro
Discryptor Symantec Endpoint Encryption McAfee Endpoint Encryption (SafeBoot)
cryptsetup/dmsetup svnd / vnconfig loop-AES
cryptoMill SpyProof! KryptOS
cryptoloop softraid / RAID C GELI
CryptArchiver Sentry 2020 GBDE
Cryptainer SecureDoc FreeOTFE
CrossCrypt SECUDE Secure Notebook FREE CompuSec
Check Point Full Disk Encryption SecuBox FinallySecure Enterprise (SECUDE)
CGD Scramdisk 4 Linux FileVault 2
CenterTools DriveLock Scramdisk FileVault
Bloombase Keyparc SafeHouse Professional eCryptfs
BitLocker Drive Encryption SafeGuard PrivateDisk E4M
BitArmor DataControl SafeGuard Enterprise e-Capsule Private Safe
BestCrypt SafeGuard Easy DriveSentry GoAnywhere 2
ArchiCrypt Live R-Crypto DriveCrypt
Aloaha Secure Stick Private Disk dm-crypt/LUKS
PGPDisk DiskCryptor

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