search for: allmydata

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2011 Jul 25
1
Ouch - brown, hansen error
...39;m not sure what I'm supposed to put in the sqrt.alpha and sigma parameters. I have several different selective regimes (trophic guilds). I have a single continuous character (body size). I read these data in as a table, and then made the columns into objects (or vectors? i.e. I did data2=allmydata$data2) and named them by node number. The tree is converted from ape. Thanks very much, and happy to provide more info... Traceback for the first error gives: > > traceback() 9: .C("bakslv", t = r, ldt = nrow(r), n = k, b = x, ldb = k, nb = nb, x = matrix(0, k, nb), jo...
2009 Oct 30
30
Truncating SHA2 hashes vs shortening a MAC for ZFS Crypto
For the encryption functionality in the ZFS filesystem we use AES in CCM or GCM mode at the block level to provide confidentiality and authentication. There is also a SHA256 checksum per block (of the ciphertext) that forms a Merkle tree of all the blocks in the pool. Note that I have to store the full IV in the block. A block here is a ZFS block which is any power of two from 512 bytes to