search for: entropy

...ling my binaries as root, and some which will have neither because they will be only installed as non-root. Below is a patch to enable choosing all 3 possible sources at compile time, with the available source selected at run time. If no configure parameters are given, it will still determine the entropy source at compile time and only the code for the one type, exactly as it does today. The patch adds a configure option called --with-builtin-entropy. I have tested this in all possible combinations of entropy sources, and on 6 different flavors of Unix (linux, solaris, sunos4, hpux, irix, and uni...

On Thu, 27 Sep 2001 20:41:05 EDT, Damien Miller writes: > On Thu, 27 Sep 2001, Dan Astoorian wrote: > > > > > It would (IMHO) be useful if there were a way to optionally configure > > that code to fall back to the internal entropy gathering routines in the > > event that EGD was not available; as it is, the routines simply fail if > > EGD is unavailable at the time the ssh daemon or client is invoked. > > > > Is this a feature the OpenSSH Portability Team would consider > > worthwhile? > &g...

...root at sco SSH Version OpenSSH-2.1, protocol versions 1.5/2.0. Compiled with SSL (0x00905820). debug: Reading configuration data /usr/local/etc/ssh_config debug: Applying options for * debug: ssh_connect: getuid 0 geteuid 0 anon 0 debug: Connecting to sco [207.234.31.38] port 22. debug: loaded 21 entropy commands from /usr/local/etc/ssh_prng_cmds debug: Seeding random number generator. debug: OpenSSL random status is now 0 debug: 3 bytes from system calls debug: Time elapsed: 20 msec debug: Got 0.06 bytes of entropy from 'ls -alni /var/log' debug: Time elapsed: 30 msec debug: Got 0.77 byte...

On 05/26/2017 08:35 PM, Leon Fauster wrote: >> Am 27.05.2017 um 01:09 schrieb Robert Moskowitz <rgm at htt-consult.com>: >> >> I am use to low random entropy on my arm boards, not an intel. >> >> On my Lenovo x120e, >> >> cat /proc/sys/kernel/random/entropy_avail >> >> reports 3190 bits of entropy. >> >> On my armv7 with Centos7 I would get 130 unless I installed rng-tools and then I get ~1300. SSH into o...

I remember a discussion to the effect that using DSA keys in sshd increases the requirement for random bits available on the system... and that this requirement (was it a 128 bit random number per connection?) presents security problems on systems that don't have a decent source of entropy? Am I misinterpreting those discussions? We are having a problem deploying sshd (no prngd) where sshd refuses to start because it says theres not enough available entropy. Would disabling DSA in sshd prevent the system from becoming "entropy starved"? If I'm missing the point of t...

> This subthread in the Xen patch thread has now digressed onto discussions > about entropy and security. Perhaps you guys could add some points. Well, I can try. I don't think this answers any questions, but perhaps it informs the discussion. Apologies if the Cc: list is getting a bit bloated. > On 11 May 2006, at 01:33, Herbert Xu wrote: >>> But if sampling virtual...

> This subthread in the Xen patch thread has now digressed onto discussions > about entropy and security. Perhaps you guys could add some points. Well, I can try. I don't think this answers any questions, but perhaps it informs the discussion. Apologies if the Cc: list is getting a bit bloated. > On 11 May 2006, at 01:33, Herbert Xu wrote: >>> But if sampling virtual...

...at htt-consult.com>, > Robert Moskowitz <rgm at htt-consult.com> wrote: >> >> On 05/26/2017 08:35 PM, Leon Fauster wrote: >>>> Am 27.05.2017 um 01:09 schrieb Robert Moskowitz <rgm at htt-consult.com>: >>>> >>>> I am use to low random entropy on my arm boards, not an intel. >>>> >>>> On my Lenovo x120e, >>>> >>>> cat /proc/sys/kernel/random/entropy_avail >>>> >>>> reports 3190 bits of entropy. >>>> >>>> On my armv7 with Centos7 I would get 13...

Hi, I am using Van Dyke SecureCRT 3.2.1 to access an AIX server running OpenSSH-2.5.0p1. Using ssh1 with X11 forwarding enabled, the server reports the following error (in the client session): Packet integrity error. (34) This problem was not evident in 2.3.0p1. Running sshd in debug gives the output: debug1: sshd version OpenSSH_2.5.1p1 debug1: load_private_key_autodetect: type 0 RSA1

Hello, suppose one is forming a probability p(x,y), where the x,y axes are somewhat accidental and rotation is possible. I'm thinking about whether the discrete entropy H(x,y) should change if the probability is rotated in the x,y plane. My current conclusion is that it _does_ change, at least if the entropy is estimated via bins. As a simple example, suppose the probability mass is concentrated in a single bin (that is not close to the center of rotation),...

...gt;>> drops back to 30! for a few minutes. Sigh. >>>>> http://issihosts.com/haveged/ >>>>> >>>>> EPEL: yum install haveged >>>> WOW!!! >>>> >>>> installed, enabled, and started. >>>> >>>> Entropy jumped from ~130 bits to ~2000 bits >>>> >>>> thanks >>>> >>>> Note to anyone running a web server, or creating certs. You need >>>> entropy. Without it your keys are weak and attackable. Probably even >>>> known already. &g...

I am use to low random entropy on my arm boards, not an intel. On my Lenovo x120e, cat /proc/sys/kernel/random/entropy_avail reports 3190 bits of entropy. On my armv7 with Centos7 I would get 130 unless I installed rng-tools and then I get ~1300. SSH into one and it drops back to 30! for a few minutes. Sigh. Anyway on m...

Hello, The question looks like simple. It's probably even stupid. But I spent several hours searching Internet, downloaded tons of papers, where deviance is mentioned and... And haven't found an answer. Well, it is clear for me the using of entropy when I split some node of a classification tree. The sense is clear, because entropy is an old good measure of how uniform is distribution. And we want, for sure, the distribution to be uniform, represent one class only as the best. Where deviance come from at all? I look at a formula and see that...

Hi Ben, here is the output from sshd -d -d -d: mvs2:sygm:/usr/local/sbin:#./sshd -d -d -d debug3: Reading output from 'ls -alni /var/log' debug3: Time elapsed: 459 msec debug2: Command 'ls -alni /var/log' timed out debug3: Got 0.00 bytes of entropy from 'ls -alni /var/log' debug3: Reading output from 'ls -alni /var/adm' debug3: Time elapsed: 143 msec debug2: Command 'ls -alni /var/adm' timed out debug3: Got 0.00 bytes of entropy from 'ls -alni /var/adm' debug3: Reading output from 'ls -alni /var/mail' d...

...ebug1: sshd version OpenSSH_2.9p1 debug1: private host key: #0 type 0 RSA1 debug1: Bind to port 22 on 0.0.0.0. Server listening on 0.0.0.0 port 22. Generating 768 bit RSA key. RSA key generation complete. After that the sshd-Daemon is stop normal, the sshd-Daemon started or not started (Not enough entropy in RN). Best Regards Michael ---------------------- Weitergeleitet von Michael Galonska/SSKMUCN/DE am 22.07.2002 14:34 --------------------------- Michael Galonska 22.07.2002 10:50 An: Ben Lindstrom <mouring at etoh.eviladmin.org> Kopie: Openssh-unix-dev at mindrot.org Thema...

suppose I have two factor vectors: x <- as.factor(c("a","b","a","c","b","c")) y <- as.factor(c("b","a","a","c","c","b")) I can compute their entropies: entropy(table(x)) [1] 1.098612 using library(entropy) but it is not clear how to compute their mutual information directly. I can compute the joint entropy as entropy(table(paste(x,y,sep=""))) [1] 1.791759 and then mutual information will be h(x) + h(y) - h(x,y) = 1.098612 + 1.098612 - 1.79175...

Hi, I'm running openssh 2.1.1p4 on Solaris 7 (sparc). Occationally, when I boot up the server, the startup script I wrote to start sshd fails to start sshd with the following error: fatal: Not enough entropy in RNG What am I doing wrong?? Is there anything I can do to prevent this from happening? Is just restarting sshd a valid thing to do?? Thanks for any thoughts, David _______________________________________________________ Say Bye to Slow Internet! http://www.home.com/xinbox/signup.h...

Hi, this is not a R question per se, but since I'm on the lookout for an R solution I thought this was the best place: I would like to calculate the entropy for a variable and the conditional entropy between two variables, H(X|Y) for variables X & Y I have coded the case for the categorical case but I'm having problems understanding how to do it for the continous case. >From what I understand, for continous variables the entropy would be...

i want to calculate shannon entropy which is H1,H2,H3....upto H7? if there is any function or any package in which i can find this entropy directly. do you have any information please share this and i will be very thankful to you. Regards, ++++++++++++++++++++++++++++++++++++++++++++++ MUHAMMAD FAISAL Dep...

This oddity happened with test2: debug: Got 0.00 bytes of entropy from /usr/bin/who debug: Got 0.05 bytes of entropy from /usr/bin/last debug: Got 0.00 bytes of entropy from debug: Got 0.88 bytes of entropy from /usr/sbin/df debug: Got 0.00 bytes of entropy from /usr/sbin/df debug: Got 0.12 bytes of entropy from /usr/bin/vmstat debug: Got 0.00 bytes of entropy fr...