In May 2022 Microsoft has fixed a vulnerability related to certificate logon to Active Directory. As a non-privileged user you could escalate privileges by impersonating a Domain Controller, as you can join machines to the domain and thus control the dnsHostName attribute. Microsoft fixed this in an indirect way: Since last May, Windows Certification Authority…
Author: elkement
Physicist, engineer, dilettante artist. Subversive El(k)ement.
Discretized and Inverted
Imagine you are an alien. You follow beams of diffracted light. A distant celestial object exuding white light. Thousands of Kelvins of blackbody radiation hitting thousands of fine wires. You see those pure spectral colors. You feel their mathematically exact intensities. You squint, and you tune in on – what we call – Red. We…
Dystopic Diffraction – ChatGPT and Poetry
I have been creating Found Poetry from search terms, from spam comments, from my own articles. I’ve followed strict rules and constraints. The stricter, the better. I am removing my consciousness as a human being from the creative process (Not my subconsciousness though!). Turning myself into a paper shuffling office clerk, feeding prompts to an…
Stargate of Diffraction. Escaping the Labyrinth of Colorful Wires.
This blog has been many things. Experimental poetry playground, notes from the field by a small business owner, popular science and tech blog, compilation of dry research reports, self-referential musing of a web developer. The only intersection between all of this has been me being interested & invested in it. I had tech-blogged myself into…
Alien Patent Art
Alien is the seed word – feed into Google Patents search. I am searching for alien patents filed between 1900 and 1910. I pick an image from the first patent found, when listing by date ascending. I multiply the image, invert it, color it, and place the series on my favorite black ground. I pick…
The Origin of Darkness
Where does it come from? Why and when did my physics/math/engineering art decide to only dwell on black backgrounds? I am sure there are proper theories in the history of art. I can come up with some armchair psychologist’s explanations – blaming popular culture, clichés, a collage of archetypical memories. I am hacker. We hackers…
Electromagic ~~~ Appeal of Antique Scientific Instruments
A collage of images and a collage of words. The images are public domain technical drawings related to electromagnetism. The lines of the poem are my prompts, followed by phrases from the first Google search results prompted by it. ~~~ Electromagic explore the illuminating history seamless and unforgettable Metal and Wood memory building work…
No Loose Ends
I don’t like loose ends. But my physics/math art curves have often been cut off, like fraying fabric. I have tried to let them taper off smoothly, letting them fade in the dark, but I would prefer closed lines. The real and imaginary towers have flat roofs. When using software, I tilt the structures, so…
Imperfect Projections
___________________ _______ __ _ _ __ _______ ___________________ Imperfect Projections dissolve the inherent rectangularity dedifferentiating the materials used dependent on the subjective attitudes create interventions change the landscape of the city with a highlight of the spatial dimension a broad utility as a datum for the objective consideration engineers who are responsible resolve multiple objectives…
Field Lines and Potentials – Reality and Imagination Reloaded
I am creating Physics Art very much like I create Found Poetry. I need tough constraints, silly rules, and tools not designed for art. In a world of perfect renderings and deep fakes, I restrict myself to programming parametric curves. Just lines. There are millions of beautiful parametric functions you could choose from. So, I…
Defused That SAN Flag!
In May, Microsoft has fixed a bug that allowed normal users to impersonate Domain Controllers. This bug allowed non-privileged users to obtain a logon certificate issued to a domain controller, because users can write to the Active Directory attribute dnsHostNameof a computer they have joined to the domain. If a machine can enroll for a…
They Shall Shine in the Dark
On February 24 I wrote: They shall shine in the dark. I use this sentence as a seed for Twitter search poetry – interlacing poetry with temperature waves again . ~ ~~ ~~~ ~~~~ They shall shine in the dark The interstellar void going down much faster determined to take over under renewed attack under…
How to Add a Subject Alternative Name Safely
I am writing about that PKI stuff again. I am running out of ideas for catchy introductions. So, here is a new post with old code! In Active Directory a UPN is mapped to a user automatically if it matches a user’s LDAP attribute userPrincipalName (and a DNS SAN is mapped to dnsHostName). A Windows…
Plural Form
Take a figure of a historical patent, meticulously drawn before there was software. It’s a Plural Grating Spectrograph. Wonder about the appeal of antique technical drawings. So modest, so sublime. Copy it, multiply it. Slowly rotate the color wheel, until the purples meet the reds again. This is an impossible spectrum. There are no purples…
Rogue Certificate Challenge: No Hardware Tokens, No Linux, Just a Web Server with Certificate Mapping.
I am back to my favorite security research: How to abuse certificates in a Windows / Active Directory environment! If an Active Directory integrated certification authority sign a certificate with a custom Subject Alternative Name of your choosing, you can impersonate any administrator in an AD forest. I’ve published two blog posts about how to…
Found Prose: Retrospective 2012-2022
You will not want to read this. Nobody does, me included. But creating it has been an interesting experiment. I have been scouring this blog for sentences, one from each blog post. In chronological order, starting in 2012. I had permitted myself to re-order sentences, but I have rarely used that option. The fountain pen…
Tribute to a Pragmatic Swiss Solar Pioneer – Who Called to Action in 1989
He is called a pragmatic doer, knowing his physics and engineering, devoid of ideology. This is how Josef Jenni is introduced in the preface to his document called How can we achieve the energy transition (Wie erreichen wir die Energiewende). It’s a manifesto and a technical overview – by the pioneer whose company had built…
Loops Near the surface. Lumped Together in Space.
There was a time, when most articles here looked like lab reports or chapters of a thesis. Occasionally, there was a weird poem thrown in. Now is the time for art only, and the thesis-like postings provide for raw material. Temperature waves beneath the ground, driven by the oscillation of the temperature on the surface…
Pioneers of the Oil Shock Era
…. a lot had been done right after the 1973 oil embargo but there exist almost no documents on theses activities. The concerned pioneers were realizing all types of heat pump systems, sometimes day and night. But they did not care for publishing. … says Professor of Engineering Martin Zogg, in his research report History…
Innovation and Scarcity (and Panic)
I tried to avoid such words. They sounded like hollow buzzwords in times of abundance, used by advertizers playing on fears. But our complacent world is taught a lesson, right now, at furious speed. I am following news as everybody else, I am reading about gloomy forecasts. An Austria paper mill has announced today it…
Lone Black Telephone
It’s a relic of the Cold War era. It is black. Once shiny Bakelite became dull. Maybe it was the chemicals. It found shelter in a darkroom. In a research center dismantling its nuclear reactor. There was no future for nuclear science after the iron curtain had crumbled. It was voiceless, robbed of its carbon…
True Colors
I have picked two colors. They shall shine in the dark. ~~~ Another version of my series Reality and Imagination. I used artistic license when tweaking the color values.
Jellyfish of Diffraction
Diffraction patterns, again. But this time I tack them to an imaginary semi-circular screen. Screens grow bigger in radius with increasing wavelength – growing more reddish. If every wavelength would be diffracted in the same way, all peaks would lie on a radius of the circle. But as red is diffracted more, maxima move to…
Creative Process. Evolution.
My creative process has been evolving gradually in the past year. ~ I am thinking about a little piece of physics, and how it is described with math. ~ Then I am creating a SageMath notebook (plus custom code) that outputs a set of functions as parametric curves in a three-dimensional space. Here, diffraction patterns…
Newton’s Space Probes Investigate my Ribbons of Diffraction
I have been calculating diffraction patterns for visible light. Curves are displaced to turn the whole structure into a wavy ribbon built from colored wires or threads. I have turned these images into collages, adding Isaac Newton’s drawings from Opticks (1704). The more I moved Newton’s figures around, and the more I twisted the ribbons…
Celestial Boosted Poetry
A poem from my last physics posts! I have picked unedited snippets from one post, starting at the bottom and moving up, then switching to the other post and again sifting through it from bottom to top. Lines must not be rearranged: the order is dictated by the order in which snippets appeared in the…
Transforming the Celestial Sphere
A spherical spaceship swooshes by at 99% of the speed of light. What will it look like? Squashed because of Lorentz contraction – like an ellipsoid? No. The outline of a moving sphere will remain spherical. Roger Penrose explained this first in 1958 – 50 years after Einstein’s formulation of the theory of special relativity….
Boosted
I have been playing with the geometry of special relativity again! The light cone signifies the invariance of the speed of light. There is a notion of length in four-dimensional spacetime, defined as c2t2 – x2 – y2 – z2. Surfaces of constant length are 4-dimensional hyperboloids. Light rays are null rays, as light travels…
Complex Alien Eclipse
My colorful complex function lived in a universe of white light. I turned off the light. Turned it into its negative. Expected it to look bleak. Like thin white bones on black canvas, cartoon skeletons of imaginary alien creatures. But it is more like the total solar eclipse I watched in 1999. There is interference,…
Trapped inside the Light Cone
Trapped inside the light cone on a path of eerie fire. Causally connected to your past . . Onward. Celestial spheres embrace the future cone gather round your burning self.
elkemental Force 