If you have confidential information on your computer and you want to protect it, use disk encryption software like TrueCrypt. TrueCrypt is a free open-source disk encryption software it works on Windows Vista/XP, Mac OS X, and Linux.
It has On-the-fly encryption feature which encrypts or decrypts data automatically right before it is loaded or saved, without any user intervention. No data stored on an encrypted volume can be read (decrypted) without using the correct password/keyfile(s) or correct encryption keys. Entire file system is encrypted (e.g., file names, folder names, contents of every file, free space, meta data, etc).
Main Features of TrueCrypt:
- Creates a virtual encrypted disk within a file and mounts it as a real disk.
- Encrypts an entire partition or storage device such as USB flash drive or hard drive.
- Encrypts a partition or drive where Windows is installed (pre-boot authentication).
- Encryption is automatic, real-time (on-the-fly) and transparent.
- Parallelization and pipelining allow data to be read and written as fast as if the drive was not encrypted.
- Provides plausible deniability, in case an adversary forces you to reveal the password:
- Hidden volume (steganography) and hidden operating system.
- Encryption algorithms: AES-256, Serpent, and Twofish. Mode of operation: XTS.
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