Messages in this thread | | | From | (David Wagner) | Subject | Re: dm-crypt, new IV and standards | Date | Wed, 3 Mar 2004 21:40:05 +0000 (UTC) |
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Jean-Luc Cooke wrote: >Christophe and I's scheme of IV = firstIV + blockNum >for initial setup and IV = IV + 2^64 for IV updates will work fine
That's not ideal. I'd suggest IV = HMAC_k(firstIV, blockNum) or somesuch. Sequential IV's aren't a good choice with CBC -- they can leak a little bit of information about the first block of plaintext, in some cases. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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