Free Encryption / Cryptographic Software, Free On the Fly Encryption, Steganography, Free Disk Encryption Tools, Free Public Key Encryption Software (thefreecountry.com)
Free On the Fly Disk / File Encryption (OTFE)
- TrueCrypt
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TrueCrypt is the successor to E4M (which is no longer maintained). You can use it to encrypt an entire partition of your hard disk (including your system partition) or to create an encrypted container file which appears like a normal hard disk to Windows. You can then store and access your files on that virtual drive just like any other file. Since the program does not mark the encrypted container (or partition) in any way, there's no way to for any intruder to guess which file is your encrypted container. This, according to the author, also preserves plausible deniability. Encryption algorithms supported include AES, Blowfish, CAST, IDEA (removed in version 2.1a) and Triple-DES. The source code is available free. This program works under Windows Vista, XP, Mac OS X and Linux.
- FreeOTFE
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FreeOTFE is an open source OTFE (on the fly disk encryption) software for Windows. It presumably creates encrypted partitions (the documentation does not explicitly state this, nor does it state if it supports the creation of encrypted container files). You mount the encrypted volume under Windows and it appears as a drive which you can use normally. FreeOTFE supports "hidden volumes" which are encrypted volumes that are created inside another encrypted volume. All FreeOTFE volumes also have no identifiable signature. It is compatible with Linux losetup, which is useful if you need to use your encrypted volumes in both Linux and Windows. Supported ciphers include AES and Twofish, and supported hash algorithms include MD2, MD4, MD5, RIPEMD-128, RIPEMD-160, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512. At the time I write this review, FreeOTFE is still in BETA testing.
- CompuSec
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This encryption software will encrypt your entire hard disk (including your operating system) using a "fast AES algorithm". It also supports the encryption of floppy disks, memory sticks and other removable devices. Even your Windows hibernation file is stored encrypted on the disk.
- Scramdisk 4 Linux
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Scramdisk 4 Linux is a suite of Linux tools that allow you to create and access Scramdisk and TrueCrypt containers. It has a Linux driver that allows you to mount such containers. Scramdisk for Windows and TrueCrypt are free on-the-fly disk encryption software that you can find elsewhere on this page.
- Cryptainer LE
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Cryptainer LE allows you to create 25 MB encrypted containers that appear to Windows as disk drives. It supports Windows 95 (OSR 2), 98, ME, 2000, XP and 2003. It uses the Blowfish algorithm. It apparently also allows you to send encrypted emails as well.
- CryptoExpert Lite
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CryptoExpert Lite is a free on the fly encryption program that creates a virtual disk on your disk from a container file. It supports the CAST encryption algorithm.
- E4M Disk Encryption
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Working with documents on your computer where you don't want prying eyes to see? You can get free software that sets up a drive on your hard disk where all files saved will be encrypted. The drive need not be an actual hard disk or partition, it can be a file that is set up to look like a drive to Windows for transparent operation. It is easy to use, free, freely redistributable with the full source code available. It works on all Windows systems. Supported encryption include DES, IDEA, Triple-DES, Blowfish, and CAST. If you find yourself continually encrypting individual files on your computer, this might prove to be the easier to use solution. Note: E4M is no longer being maintained. The link above leads to a third party site.
- Scramdisk Encryption
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Scramdisk allows you to create an encrypted virtual drive on your Windows systems where you can store files which will be automatically encrypted. The drive acts like a normal drive which you can access just like any other disk drive on your system. Supported encryption algorithms include Triple DES (EDE), Blowfish, DES, IDEA, MISTY1, Square, and TEA (both 16 and 32 rounds). This software is no longer supported.
Free Public Key Encryption Software
- Windows Privacy Tray (WinPT)
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Windows Privacy Tray (WinPT) is a set of tools that allow you to encrypt your data using GnuPG (see elsewhere on this page). It is a frontend to GnuPG that resides in your system tray that may be used as a universal plug-in to any email software. The software is free.
- PGP (Pretty Good Privacy) Public Key Encryption
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The above link is to the International PGP Home Page, where you can get free binaries and sources for Pretty Good Privacy (PGP) for a variety of operating systems for either US or non-US countries. You can use PGP to encrypt your email in conjunction with your email client, be it Eudora, ELM, PINE, or whatever. PGP is a public key encryption system, which means that you have two keys (passwords), one which is known only to you and the other is known to your recipient. Messages or documents (or whatever) encoded with one key can only be decoded with the other. You can read more about this from the PGP FAQs at the site.
- GPG: GNU Privacy Guard
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GPG, a.k.a. GnuPG, is the GNU version of PGP (Pretty Good Privacy), a public key encryption system. Like all things GNU, it is free and can be freely distributed and modified. It is generally compatible with the newer PGP versions (depending on the encryption algorithms you choose); but you should read their FAQ for more details.
Free Encryption Software with Steganography
- 4t HIT Mail Privacy Lite
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This encryption software allows you to hide your private data such as email messages inside an image (JPG, GIF, TIFF, BMP, etc). The image is still viewable as an image, but it also contains the encrypted version of your secret message (steganography). The website does not specify which encryption algorithm is used.
Other Free Encryption Software, Free Disk Encryption Tools
- AxCrypt
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AxCrypt allows you to encrypt your files with the AES encryption algorithm (128-bit key). It supports the use of key files, huge files (more than 4 GB), shredding of temporary and plaintext files, an extensive command line interface as well as a right click interface from Windows Explorer, etc. The program is open source, distributed under the GNU General Public License.
- FineCrypt
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FineCrypt allows you to encrypt a limited number of folders and files (although it will not encrypt archives like ZIP, ARC, CAB, ARJ, TAR and GZ files). Encryption algorithms supported include MARS, RC-6, Rjindael (AES), Serpent, Twofish, and others. You can encrypt select your encryption mode as well, from ECB, CBC, CFB and OFB. The software also allows you to create encrypted self-extracting executables.
- CCrypt
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CCrypt is a command line encryption tool that encrypts the files you specify. It is multiplatform with ports for Windows, Linux, Sun Solaris, Macintosh OS X, FreeBSD, AIX, etc. It uses the Rjindael AES cipher (Advanced Encryption Standard). The source code is available.
- LockNote (Windows)
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This program lets you store your serial numbers, passwords, and other types of text notes in an encrypted form (AES 256). It's extremely portable in that it's just a single file that does not have to be installed, and can be placed on a portable media like a USB flash drive. The data you store is saved into the program file itself meaning that all you need to do to move your data to another location is to copy the program there. You can also save to a different file, which merely recreates a copy of the program, together with your data, in a new file. The password for your encrypted notes can be set by selecting the "File" menu followed by the "Change password..." menu item. The program is open source, released under the GNU General Public License.
- MCrypt
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mcrypt is a command line tool in the fashion of the Unix crypt command. It allows you to encrypt files that you specify on the command line using one of the following encryption algorithms: Blowfish, Twofish, DES, TripleDES, 3-Way, Safer, Loki97, Gost, RC2, Mars, Rjindael AES, Serpent, Cast, Arcfour and Wake. The OpenPGP encrypted file format is supported. This encryption tools works on Unix systems (including Linux) and has also been ported to Windows.
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