Centroid.EU Blog
(this blog is mostly encrypted - adults only)
|
Previous Page
December 1st, 2016
I just watched Edward Snowden on a clip on youtube during dinner and he made
a great speech regarding that presidents can't fix the mass surveilance problem
and that we must fix it (as a world movement). He said we must weigh the
should we and shouldn't we or something, because lately it's been the can or
can't we. This reminded me that the german BND (spy service) has been given
150 million EUR to spy on people's snapchat and other encrypted forms of
communication. We have to work against the powerstructures that want to take
our privacy and route around these.
BTW there is fake news possibly saying that Julian Assange has been kidnapped
by CIA. Fake news can be so annoying because they could turn out to be real.
Julian, I hope you're OK!
0 comments
Blueberries
November 29th, 2016
At my local supermarket I picked up a batch of blueberries. When I ate them
I noticed a change in vision and a hightened awareness. This made me
curious what I experienced. For one it enacted in my visual senses, so that
must be the occipital lobe area of the brain. Reading online about this
fruit I found that it is classed a "superfood", a nutrition bomb so to speak.
It is high in Vitamin C and K and has manganese. It is good to have when
you have nutritional deficiencies. It sure made a diff for me this afternoon.
Also its latin name of its genus: vaccinium sounds like the english vaccine.
Maybe there is a relation. I'm glad I experimented with this.
0 comments
My OpenBSD bridge inside Freifunk Franken
November 23rd, 2016
Freifunk Franken is a network that is partitioned into what's called hoods.
While the entire network consists of 10.50.0.0/16, my hood has 10.50.60.0/19
or something. I'm in the Hassberge Sued Hood which is centered around
Hassfurt. Each hood represents a Layer 2 (Datalink layer) network, so you
can reach within 1 IP Hop everything inside it. Since geographically my
parents house and my apartment are in the same Hood, I set up an OpenBSD
machine as a bastion host between my internal network and the freifunk franken
network to do IPSEC tunneling in order to have security and integrity between
my parents house and my house. The bastion host I set up at my parents house
looks like this:
It is a PC-ENGINES APU router that does not have forwarding between its
interface, hence there is no way to misroute things.
I've been running this for a few weeks now and have hooked up SIP phones to
this. The phone conversations are clear as ever (38 ms ping). Knowing that
they are encrypted is a big bonus.
0 comments
The Hydrogen Economy
November 23rd, 2016
My dad thinks this is a real good concept. The Hydrogen Economy. Unfortunately we're not there
yet, but rest be assured our militaries submarines have been using these for
quite a while. Maybe in another lifetime will we civilians make use of this.
0 comments
OpenBSD Donation Time
November 19th, 2016
Part 2/2 of this year, I have donated 100 EUR to Theo de Raadt. This wraps
up my donations to all *BSD's this year. BTW the donation meter at
OpenBSD foundation
is almost filled to the goal. Congrats OpenBSD!
0 comments
A real exciting Idea
November 10th, 2016
Yesterday I was brainstorming how to "sign" binaries in OpenBSD, and I caught
an itch. I don't know if I'll ever do this but I've given it thoughts since
yesterday. First though I want to show you this,
here.
I'm not the only person that thinks a signed binary in OpenBSD would be a good
idea. So then I thought about how to do this a little.
In the kernel the exec routines for reading an ELF binary would have to be
modified in the following way. It reads the ELF program header table and
expects a PT_OPENBSD_ELFSEC program header identification. By reading in
the entire binary upon exec, given that the user is not root (a suser check)
and caching shows no binary behing checked before (a walk of a LIST), the
kernel HMAC checksums the binary with a key that was ioctl'ed into the kernel
at boottime under securelevel 0, in fact this check is only done if the
securelevel is > 0. It then compares the section of PT_OPENBSD_ELFSEC
and it it matches it discards the read file, and lets read-on-demand take
over for the file. It is running a genuinely "signed" binary.
In userland there is 4 programs that get modified. Binutils, strip, elfsec
and elfsecd. When compiling new programs the PT_OPENBSD_ELFSEC program header
gets added to the ELF program headers. As root you can execute any signed
binary becasue then it doesn't matter if signed or not, a hacker has all
control over the system. When binaries are compiled make calls strip with
a new argument which will "bless" a binary with the elfsec program when root.
When a non-root user it is checked first if a user is allowed to bless
binaries and then elfsec speaks with elfsecd to bless a binary with the
private key that only root can read, a bunch of descriptor passing within the
imsg framework would work out nicely. The elfsec binary should also be able
to bless entire directories such as /bin, /sbin, /usr/bin, /usr/sbin etc.
This is the track I have wrapped my thoughts around. Dunno if it's worth it
but the installer program would need to be modified to rebless new binaries in
an upgrade. That would satisfy all those naysayers that say it would never
work. In the end result you prevent someone else from importing binaries that
you don't want runnning on your system. Perhaps a worm of sorts. It's
another level of security and it would cost an attacker a lot of resources to
crack the private key to each binary. It would slow down a system somewhat,
but I've been using SSD's for a few years now and don't see this as much of
an issue, also there is caching which should speed this up.
Hehe, thinking of vapourware can be mind consuming for sure :-).
0 comments
Government (NASA) Space Program likely to suffer under Trump
November 9th, 2016
I talked a little about the American and European space programs in the past.
Now on one hand it was a GOP under Dubya Bush who wanted Moon to Mars. However
Trump has other priorities. He wants to fix the potholes in America first.
He makes economic sense, there is no glory when your infrastructure is
failing. But we likely won't see much action until at least 2021, that's after
his first term is my thought. With Obama the American Space Program suffered
but Obama set something in motion that was perhaps a smart move. The private
space industry, SpaceX, boeing, those sorts of private enterprises.
0 comments
Donald Trump is president of the US-elect
November 9th, 2016
I did not cheer for Hillary and I did not cheer for Trump. Americans failed
to look for the alternatives. My favourite was Jill Stein, who got very little
votes if any. I did not cheer for the "lesser evil" I turned my thoughts away
from the Clinton-Trump pair, even though people tried to tell me I had to
chose. I don't have to chose, I chose the alternative. Hopefully the Donald
will not wreck too much in relations between my country and the USA. I count
on the real alternative, the US Green Party.
0 comments
Arctic Fibre aquired by Quintillion Networks
November 8th, 2016
Today is the first day of snow I experienced in 2016 fall season. In 2013 I
experienced the same first few days of snow in
Iqaluit, Nunavut.
Because I
saw a connection I researched the past and found in a link that Arctic Fibre
of Toronto, Canada was aquired by
Quintillion Networks last june. Quintillion Networks seems
to be run by people from Alaska. It reminded me how my friend in Iqaluit said
that Barrow, Alaska has a lot in common with Iqaluit (I think he said that on
twitter). Anyhow the Canadian part joining with the Alaskan part and stretching
to the UK is probably in limbo since it's been pushed back to Phase 3. But
here is hoping that Iqaluit will get terrestrial submersed fibre optic cable
some day.
0 comments
First day of Snow for the Season
November 8th, 2016
Yesterday I increased the heat to #2 on my electric "nachtspeicher" furnaces.
Tonight it's snowing. Stille Nacht.
0 comments
Next Page
|
Search
RSS Feed
Click here for RSS
On this day in
Other links
Have feedback?
By clicking on the header of an article you will be
served a cookie. If you do not agree to this do not
click on the header. Thanks!
Using a text-based webbrowser?
... such as lynx? Welcome back it's working again for the time being.
Older Blog Entries
November, 2023
October, 2023
September, 2023
August, 2023
July, 2023
June, 2023
May, 2023
April, 2023
March, 2023
February, 2023
January, 2023
December, 2022
November, 2022
October, 2022
September, 2022
August, 2022
July, 2022
June, 2022
May, 2022
April, 2022
March, 2022
February, 2022
January, 2022
December, 2021
November, 2021
October, 2021
September, 2021
March, 2021
February, 2021
January, 2021
December, 2020
November, 2020
October, 2020
September, 2020
August, 2020
July, 2020
June, 2020
May, 2020
April, 2020
March, 2020
February, 2020
January, 2020
December, 2019
November, 2019
October, 2019
September, 2019
August, 2019
July, 2019
June, 2019
May, 2019
April, 2019
March, 2019
February, 2019
January, 2019
December, 2018
November, 2018
October, 2018
September, 2018
August, 2018
July, 2018
June, 2018
May, 2018
April, 2018
March, 2018
February, 2018
January, 2018
December, 2017
November, 2017
October, 2017
September, 2017
August, 2017
July, 2017
June, 2017
May, 2017
April, 2017
March, 2017
February, 2017
January, 2017
December, 2016
November, 2016
October, 2016
September, 2016
August, 2016
July, 2016
June, 2016
May, 2016
April, 2016
March, 2016
February, 2016
January, 2016
December, 2015
November, 2015
October, 2015
September, 2015
August, 2015
July, 2015
June, 2015
May, 2015
April, 2015
March, 2015
February, 2015
January, 2015
December, 2014
November, 2014
October, 2014
September, 2014
August, 2014
July, 2014
June, 2014
May, 2014
April, 2014
March, 2014
February, 2014
January, 2014
December, 2013
November, 2013
October, 2013
September, 2013
August, 2013
July, 2013
June, 2013
May, 2013
April, 2013
March, 2013
February, 2013
January, 2013
December, 2012
November, 2012
October, 2012
September, 2012
August, 2012
July, 2012
June, 2012
May, 2012
April, 2012
March, 2012
February, 2012
January, 2012
December, 2011
November, 2011
October, 2011
September, 2011
August, 2011
July, 2011
June, 2011
May, 2011
April, 2011
March, 2011
February, 2011
January, 2011
December, 2010
November, 2010
October, 2010
September, 2010
August, 2010
July, 2010
June, 2010
May, 2010
April, 2010
March, 2010
February, 2010
January, 2010
December, 2009
November, 2009
October, 2009
September, 2009
August, 2009
July, 2009
June, 2009
May, 2009
Powered by BCHS
|