DiskCryptor - is the only truly free solution, provided under GNU General Public License (GPLv3), which offers encryption of all disk partitions, including the system one. The main criterion for an open software, is the availability of its source code under one of the open source licenses. The only analogous to DiskCryptor software, with the open source code, is the TrueCrypt. However, because of the restrictive license under which the TrueCrypt is provided, - the TrueCrypt Collective License, TrueCrypt cannot be classified as a truly free software, as it places limits for developers, on the use and modification of its source code. The other Similar in function to DiskCryptor programs, are fully proprietary ones, which makes them unacceptable to use for Protection of a confidential data.
Originally, DiskCryptor was conceived as a replacement for DriveCrypt Plus Pack and PGP Whole Disk Encryption (WDE), now however, the aim of the development of the project, is the creation of the best in its category, software. Moreover, in the future, considerable effort will be devoted to creation of a detailed documentation, explaining the internal mechanics of the program, which would be the best confirmation and demonstration of its security.
DiskCryptor releases from 0.1 to 0.4 were fully compatible with TrueCrypt, as they used a corresponding partition format and encrypted data with AES-256 Algorithm in LRW mode. Starting from DiskCryptor 0.5, the program relies its own partition format, developed specifically for encrypting partitions with data on them, as TrueCrypt format has been originally meant for creation of empty volumes. That move allowed for increase in DiskCryptor's stability, get rid of many problems associated with file systems, and to create an optimal format for further development of the program.
