G
Guest
How does the diffuser work under BitLocker encryption?
Is the diffuser applied to each block of cyphertext within a sector, or is
it somehow applied across several blocks concurrently or across the entire
sector at once, some how?
I'm assuming that for an AES-256 bit key, BitLocker encrypts the entire
512-byte sector using 32-byte blocks of data. The Cypher Block Chaining
(CBC), XOR's the cyphertext output of the previous block with the plaintext
of the current block. How is diffusion applied, and how is the diffuser
generated?
Some nice references on good ol' wikipedia:
http://en.wikipedia.org/wiki/Confusion_and_diffusion
http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation
Thanks!
Is the diffuser applied to each block of cyphertext within a sector, or is
it somehow applied across several blocks concurrently or across the entire
sector at once, some how?
I'm assuming that for an AES-256 bit key, BitLocker encrypts the entire
512-byte sector using 32-byte blocks of data. The Cypher Block Chaining
(CBC), XOR's the cyphertext output of the previous block with the plaintext
of the current block. How is diffusion applied, and how is the diffuser
generated?
Some nice references on good ol' wikipedia:
http://en.wikipedia.org/wiki/Confusion_and_diffusion
http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation
Thanks!