Why use full disk encryption
If you encrypt your whole hard drive including your operating system you will not have to worry about wiping data, clearing the Internet browser cache, deleting temporary files and encrypting individual files, all you will have to worry about is choosing a strong passphrase that can not be broken using a brute force attack (trying dictionary words).
The only way to access a fully encrypted operating system is by getting access to the computer while it is switched on (decrytped), you will save lots of time if you decide to encrypt your full operating system, it is not difficult and there is free software for that. Windows Vista and 7 come with BitLocker Drive Encryption for full disk encryption but only the more expensive business high end editions do and it has been designed for businesses with few home user features.
Full disk encryption software without backdoor
Truecrypt (Free): It’s wizard driven menu will guide you through the whole encryption process, there are many algorithm choices, if you do not understand what they mean leave all of the default choices on, they are secure enough for everyone. Truecrypt can encrypt external devices, create virtual encrypted drives and create a hidden encrypted operating system, to be used if you are forced to give up the password.
You will find it easy to find support for Truecrypt at computer security forums and Usenet groups as it is one of the most used full disk encryption programs.
Truecrypt encryption algorithm
DiskCryptor (Free): Open source encryption software, it can encrypt partitions that have already data on them, it supports AES, Twofish and Serpent encryption algorithms, allows you to encrypt USB flash drives and external hard disks with automatic mounting, support for key files, option to place the boot loader on an external device.
DiskCryptor full disk encryption
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