Free open source on-the-fly encryption software
TrueCrypt volumes can be encrypted using the following algorithms:
| Algorithm | Designer(s) | Key Size (Bits) | Block Size(Bits) | Mode of Operation |
|---|---|---|---|---|
| AES | J. Daemen, V. Rijmen | 256 | 128 | XTS |
| Serpent | R. Anderson, E. Biham, L. Knudsen | 256 | 128 | XTS |
| Twofish | B. Schneier, J. Kelsey, D. Whiting, D. Wagner, C. Hall, N. Ferguson | 256 | 128 | XTS |
| AES-Twofish | 256; 256 | 128 | XTS | |
| AES-Twofish-Serpent | 256; 256; 256 | 128 | XTS | |
| Serpent-AES | 256; 256 | 128 | XTS | |
| Serpent-Twofish-AES | 256; 256; 256 | 128 | XTS | |
| Twofish-Serpent | 256; 256 | 128 | XTS |
For information about XTS mode, please see the section Modes of Operation.