Inside the windows vista disk encryption algorithm

The Windows Vista Enterprise and Ultimate editions use Bitlocker Drive Encryption, which encrypts all data on the system volume. The important part of Bitlocker algorithm is the AES-CBC + Elephant diffuser encryption algorithm. Four tests were run on the cipher to examine the the strength of AES-CBC + Elephant. The ability of reducing the number of runs of Diffuser A and Diffuser B to increase performance was studied. Speeding up encryption using parallelization is possible with the widespread use of dual-core processors. The performance of the AES-CBC + Elephant diffuser and the proposed AES-ECB + Elephant diffuser on a single processor was studies. It was observed that the cipher possesses good diffusion properties that can reduce manipulation attacks.