All Questions
Tagged with disk-encryption block-cipher
4 questions
0
votes
0
answers
197
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Combining stream cipher with block cipher for disk encryption
You take something like chacha20 and use the disk block # to seek it, xor it with the data block and then encrypt it with a block cipher in ECB mode.
Would this be secure?
Edit:
To avoid getting ...
user64218
3
votes
1
answer
523
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Does XTS provide random write access?
I'm trying to find a sufficient encryption mode that supports random read and write access. It seems like XTS is a perfect fit, since in my use case authentication and integrity insurance are handled ...
- 33
6
votes
2
answers
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Encrypt-Mix-Encrypt: Full Diffusion?
I've read "A Parallelizable Enciphering Mode" by Halevi and Rogaway about the encrypt-mix-encrypt mode for ciphers and was asking myself if this mode provides "full" diffusion.
So if an attacker ...
- 46.4k
3
votes
1
answer
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Galois field step in XEX mode
I'm reading through the XEX mode spec, and I want to make sure I've understood the $\alpha^j$ step correctly:
$X = E_K(I) \oplus \alpha^j$
$C = E_K(M \oplus X) \oplus X$
where:
$M$ is the ...
- 3,567