search for: merkl

...y at randombit.net> Subject: Re: [cryptography] rolling hashes, EDC/ECC vs MAC/MIC, etc. Reply-To: Crypto discussion list <cryptography at randombit.net> Dear Nico Williams: Thanks for the reference! Very cool. What I would most want is for ZFS (and every other filesystem) to maintain a Merkle Tree over the file data with a good secure hash. Whenever a change to a file is made, the filesystem can update the Merkle Tree this with mere O(log(N)) work in the size of the file plus O(N) work in the size of the change. For a modern filesystem like ZFS which is already maintaining a checksum t...

On Tue, Feb 28, 2023 at 12:24:04PM +0100, Laszlo Ersek wrote: > On 2/27/23 17:44, Richard W.M. Jones wrote: > > On Mon, Feb 27, 2023 at 08:42:23AM -0600, Eric Blake wrote: > >> Or intentionally choose a hash that can be computed out-of-order, such > >> as a Merkle Tree. But we'd need a standard setup for all parties to > >> agree on how the hash is to be computed and checked, if it is going to > >> be anything more than just a linear hash of the entire guest-visible > >> contents. > > > > Unfortunately I suspect...

...ates, so I don't think that random variability is the culprit. I suspect that the version 2.0.0 result is correct because my larger program worked under 2.0.0 and did not work under 2.1.0. I have loaded the coda package and VR bundle in each case. I appreciate any and all help/tips. -Ed Merkle

https://github.com/kubevirt/containerized-data-importer/issues/1520 Hi Eric, We had a question from the Kubevirt team related to the above issue. The question is roughly if it's possible to calculate the checksum of an image as an nbdkit filter and/or in the qemu block layer. Supplemental #1: could qemu-img convert calculate a checksum as it goes along? Supplemental #2: could we detect

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 128k (the default). The SHA256 checksums are used even for blocks in the pool that aren''t encrypted and are used for detect...

On Mon, Feb 27, 2023 at 08:42:23AM -0600, Eric Blake wrote: > Or intentionally choose a hash that can be computed out-of-order, such > as a Merkle Tree. But we'd need a standard setup for all parties to > agree on how the hash is to be computed and checked, if it is going to > be anything more than just a linear hash of the entire guest-visible > contents. Unfortunately I suspect that by far the easiest way for people who host...

...hat have one of the first 255 ascii codes using chars8bit() in the sfsmisc package. One example is the division sign: text(0,0.2,chars8bit(247),font=10) I have not been able to display other symbols in microsoft fonts, however. Is this possible to do in R? All replies are appreciated. -- Ed Merkle, PhD Department of Psychology Wichita State University Wichita, KS

On 2/27/23 17:44, Richard W.M. Jones wrote: > On Mon, Feb 27, 2023 at 08:42:23AM -0600, Eric Blake wrote: >> Or intentionally choose a hash that can be computed out-of-order, such >> as a Merkle Tree. But we'd need a standard setup for all parties to >> agree on how the hash is to be computed and checked, if it is going to >> be anything more than just a linear hash of the entire guest-visible >> contents. > > Unfortunately I suspect that by far the easiest w...

On 02/09/2017 01:11 PM, Leonard den Ottolander wrote: > On Thu, 2017-02-09 at 12:58 -0600, Johnny Hughes wrote: >> At the time of extraction, the <name>.metadata file is created (again, >> not by us, but by the Red Hat team that distributes source), and all the >> non-text sha1sums are in there as well as all the text sources. > > Aha, <name>.metadata, well,

...LATAM > CC-GLOBAL > MBSINTL > GLOBAL > MEDIA > AP-MEDIA > MEDIAGROUP > PLC-GLOBAL > ECOMMERA0 > GRUPOALESPORT > MITCH > JBCP > USCONCEPTS > MCGARRYBOWEN > AXDEV > AXTEST > GRUPOPPR > MGNTX > SWIRL-DS > BI > CORP > YMEDIA > FLOCK > MERKLE > root at esmad1apl01:~# id media\\skumar17 > id: 'media\\skumar17': no such user > root at esmad1apl01:~# wbinfo -n media\\skumar17 > S-1-5-21-781940509-1026920532-2428315864-69799 SID_USER (1) > root at esmad1apl01:~# > So, what I read from this is,? your 19 DCs are all...

On Mon, Aug 20, 2018 at 10:43:52AM -0500, Dirk Eddelbuettel wrote: > > On 20 August 2018 at 15:29, Eva Myers wrote: > | Hello, > | Attempting to install ess (17.11-3xenial0) on our Ubuntu 16.04 systems > | is failing with an error message. > > This can happen. I (with my Debian hat on) had to make 17.11-3 because the > ess package did not behave with Debian untable and

Hello R Community, I am using the Lavaan package in R 2.15.0 to analyze data collected from 1200 lakes across North America. My dataset includes 3 continuous independent variables (LOG_NTL, LOG_PTL, and LOG_SR_A_D) and 1 continuous dependent variable (BIOVOL) . I have successfully constructed structural equation models using the Lavaan package (example included below with code), but I have not

Hi all, I apologies in advance if I am missing something very simple here, but since I failed at resolving this myself, I'm sending this question to the list. I would appreciate any help in understanding how the rpart function is (exactly) computing the "improve" (which is given in fit$split), and how it differs when using the split='information' vs split='gini'

Hello, I noticed a strange thing when attempting to upgrade a specific package (lavaan) from c2d4u and wondered if someone could confirm the problem. In short, apt seems to think that an older version from the "universe" repo is higher than the newer version from c2d4u. When I do apt-cache showpkg r-cran-lavaan I get the output at the bottom of this email. Then, I tried to force

So I have 2 sets of data - a training data set and a test data set. I've been doing the analysis on the training data set and then using predict and feeding the test data through that. There are 114 rows in the training data and 117 in the test data and 1024 columns in both. It's actually the same set of data split into two. The rows are made of 5 different numbers. They do represent

Hi, I am a new user of R using R 2.8.1 in windows 2003. I have a csv file with single column which contain the 30,000 students names. There were typo errors while entering this student names. The actual list of names is < 1000. However we dont have that list for keyword search. I am interested in grouping/cluster these names as those which are similar letter to letter. Are there any

On 08/11/2017 12:16 PM, Chris Murphy wrote: > On Fri, Aug 11, 2017 at 7:53 AM, Robert Nichols > <rnicholsNOSPAM at comcast.net> wrote: >> On 08/10/2017 11:06 AM, Chris Murphy wrote: >>> >>> On Thu, Aug 10, 2017, 6:48 AM Robert Moskowitz <rgm at htt-consult.com> >>> wrote: >>> >>>> >>>> >>>> On

I've re-read this thread but its a bit confusing due to 2 persons with the same probem in one thread. Im thinking here, how is samba started, since winbind is not running. Im suspecting samba-addc or samba is starting. Not smbd nmbd winbind. I suggest to run this: Disable that all again. systemctl disable samba-addc samba smbd nmbd winbind systemctl mask samba-addc samba smbd nmbd

Not sure if it''s been posted yet, my email is currently down... http://weblog.infoworld.com/yager/archives/2007/10/suns_zfs_is_clo.html Interesting piece. This is the second post from Yager that shows solaris in a pretty good light. I particularly like his closing comment: "If you haven''t checked out ZFS yet, do, because it will eventually become ubiquitously implemented

> On 20 August 2018 at 15:29, Eva Myers wrote: > | Hello, > | Attempting to install ess (17.11-3xenial0) on our Ubuntu 16.04 systems > | is failing with an error message. > > This can happen. I (with my Debian hat on) had to make 17.11-3 because the > ess package did not behave with Debian untable and Emacs 26.2. It does now. > > Changes can have side effects. Turn out