Bjarne Thomsen



My Astronomy Weblog

Pierluigi Paganini's Weblog

Permanent Digital Identities that Don’t Require a Central Authority

AV-TEST - The Independent IT-Security Institute

The Art and Science of Cause and Effect

Szostak: On the Origin of Life

Alexandra Elbakyan's SCI-HUB

Interstellar Transport

Photoelectric Magnitudes and Red-Shifts

Atmospheric CO2 at Mauna Loa Observatory

Tools for linux performance monitoring

Next generation mobile networks

Scan your Magento shop

HashCat: Advanced Password Recovery

Computer Security Resource Center (CSRC)

Disabling Intel ME 11 via undocumented mode

Intel AMT Vulnerability

HTTPS Interception Weakens TLS Security

NIST Special Publication 800-177

Telescope Filter Data

Negative Absolute Temperature

Electromagnetic Counterparts to Black Hole Mergers Detected by LIGO

Observation of Gravitational Waves from a Binary Black Hole Merger

GW150914: The Advanced LIGO Detectors in the Era of First Discoveries

GW150914: First results from the search for binary black hole coalescence with Advanced LIGO

Properties of the binary black hole merger GW150914

Tests of general relativity with GW150914

The Rate of Binary Black Hole Mergers Inferred from Advanced LIGO Observations Surrounding GW150914

Observing gravitational-wave transient GW150914 with minimal assumptions

Characterization of transient noise in Advanced LIGO relevant to gravitational wave signal GW150914

Calibration of the Advanced LIGO detectors for the discovery of the binary black-hole merger GW150914

Astrophysical Implications of the Binary Black-Hole Merger GW150914

GW150914: Implications for the stochastic gravitational wave background from binary black holes

LHC sees hint of boson heavier than Higgs

Evidence for a Distant Giant Planet in the Solar System

KIC 8462852 - the brightness dropped by up to 22%

KIC 8462852 - Where's the flux?

The Signatures of Transiting Megastructures

Radio SETI Observations of the Anomalous Star KIC 8462852

Constraints on the circumstellar dust around KIC 8462852

KIC 8462852 Faded at an Average Rate of 0.165+-0.013 Magnitudes Per Century

Extremely metal-poor stars in the bulge of the Milky Way

High-precision abundances of elements in solar twin stars

Testing Einstein's Equivalence Principle with Fast Radio Bursts

On Testing the Equivalence Principle with Extragalactic Bursts

Tests of the Einstein Equivalence Principle using TeV Blazars

Distinguishing between ΛCDM and modified gravity

Latest Blockchain Transactions

Bitcoin Price Index Chart

Dansk Bitcoinforening

Unclassified statment at the hearing "FISA AMENDMENTS ACT"

Trustworthy x86 laptops?

Open Technology Fund

Open Whisper Systems: Signal Messenger and Phone

Anonymous instant messaging for real privacy


K-9 Mail

TextSecure client package for Go

Qubes OS obtains Security by Isolation

Privacy for anyone anywhere

Subgraph is an open source security company

The Whonix Anonymous Operating System

Secure your Email with Proton Technologies AG(CH)

Support the ProtonMail Defense Fund

Guide to DDoS protection

Off-the-Record Messaging Protocol version 3

Calyx Public Jabber/XMPP Server

The Jabber/XMPP Client Pidgin

CAPTCHA: Telling Humans and Computers Apart Automatically

TOX: A New Kind of Instant Messaging

based on NaCl by D. J. Bernstein, T. Lange, P. Schwabe

Personal data:
Name: Bjarne Thomsen
Title: Lektor (emeritus)

Password: "tr -cd '[:alnum:]' < /dev/urandom | fold -w12 | head -n1"

Peter Stetson's Standard Stars

Shodan is the world's first search engine for Internet-connected devices

Cyber Security Courses

Dual EC: A Standardized Back Door

Failures in NIST's ECC standards

Scott Helme on security

Appcanary on HTTP security headers

Adam Lan­g­ley's Weblog

Google kæmpede mod hemmelig udlevering af e-mails

Millions of HTTPS, SSH, and VPN servers all use the same prime numbers!

The DROWN Attack

How's My SSL

Testing the SSL in your Browser and Server

Free SSL Server Test


DMARC Inspector

Test the Spammyness of your Emails

Demystifying the DMARC Record

Can I use CSS, HTML5, JS API features

Scan your site for security headers

Public Key Pinning

Norse: Live Attacks

Hookflash: Live Mobile Voice and Video

Cipher Suites Supported by Your Browser

Let’s Encrypt is a new Certificate Authority

LibreLAMP - A LAMP Stack for RHEL/CentOS 7

Compile nginx and LibreSSL

Things that use Curve25519 or Ed25519

Your Location

Whois Lookup

DNS leak test

Boxcryptor – Secure your Cloud

Zero-Knowledge SpiderOak Backup

JonDo – the IP Changer

ZenMate route your traffic through our TLS 1.2 cloud-network

Privatoria is your secure and confidential Internet

Whiteout Mail runs on all of your devices

Telegram messaging: A native app for every platform

Secure Messaging Scorecard

Keys Under Doormats: Mandating insecurity

The PRACTICE project aims to build a secure cloud

Post-quantum cryptography for long-term security

IBM on Security Intelligence

Kaspersky Lab ZAO(RU) on Browsing Privacy

HackRead Media (United Arab Emirates)

ArsTechnica - Security

The Hacker News

The Citizen Lab

The Next Web

The Register on Security

The Techrepublic on Security

Android Vulnerabilities



The password you can't change

The Privacy Risk Of Behavioral Profiling

Many Privacy Tools

HTTPS Everywhere

Tracking Protection on Firefox

Who’s tracking you: Lightbeam

Online protection: Self-Destructing Cookies

Online protection: GHOSTERY

Online protection: DISCONNECT

Online protection: AdBlock Plus

Online protection: Privacy Badger

Online protection: uBlock

Online protection: Track Me Not

Online protection: Random Agent Spoofer

Online protection: Keyboard Privacy

Gamow: the Expanding Universe starts from a cold cloud of neutrons.

Alpher, Bethe & Gamow (1948):

a) The observed abundances can be explained by capture of fast neutrons, b) if the time integral of the neutron density has a certain value. c) However, as this integral diverges at t=0, it is necessary to assume 1) the temperature was so high that the nuclei disintegrated, or 2) the density of the Universe never exceeded a certain value. d) "The building-up process was apparently completed when the temperature of the neutron gas was still rather high, since otherwise the observed abundances would have been strongly affected by the resonances in the region of the slow neutrons". The cold cloud of neutrons is abandoned.

Gamow: A hot beginning can prevent neutron capture from diverging as t->0.

Gamow's Hot Big Bang, June 21, 1948

Gamow: Could rotation prevent neutron capture from diverging as t->0?

Alpher's Neutron-Capture Theory, 1 December 1948

cannot, however, explain the extremely low abundances of Li, Be, and B.

Alpher, Herman & Gamow suggest that these are due to thermonuclear destruction.

The neutron cross section in barns at 1 MeV is assumed to depend on A as

log(sigma) = 0.03A - 4.00, for atomic weight (A) below 100

log(sigma) = -1.00, for atomic weight above 100

In 1949 Fermi & Turkevich studied 28 reactions between n, H, D, T, He3 and He4.

Can the inclusion of thermonuclear reactions bridge the non-existent nuclei at 5 and 8?

Unfortunately the answer is no, but it is very easy to produce helium.

Their unpublished results were communicated to Gamow, Alpher & Herman.

Relative abundances of the very light elements as calculated by Fermi & Turkevich:

Alpher, Follin & Herman's Initial Stages, 15 December 1953:

The study of the elementary particle reactions leads to the time dependence of the proton-neutron concentration ratio, a quantity required in problems of nucleogenesis.

On the basis of the new physical conditions which have been discussed here, it would appear necessary to re-examine the specific reactions among the lighter nuclei, particularly as regards the missing species at A = 5.

Such calculations were actually done, but never published, according Alpher & Herman, in "GENESIS of the BIG BANG".

Their results were presented at several conferences during the following years.

Life of George Gamow

In 1954 Gamow developed an interest in biological phenomena and published papers on the information storage and transfer in a living cell. In these papers he proposed the so-called "genetic code," an idea later completely confirmed by experimental studies in laboratories.

F. HOYLE & R. J. TAYLER, Sep 12, 1964:

The Mystery of the Cosmic Helium Abundance.

Nambu(1960): Quasiparticles and Gauge Invariance in the Theory of Superconductivity.

Goldstone(1961): Field Theories with Superconductor Solutions.

Higgs(1964):Broken Symmetries and the Masses of Gauge Bosons.

Constraints on Pseudo-Nambu--Goldstone Boson Quintessence

Foundational Questions Institute

The Holographic Universe

Holographic Noise of Spacetime


Torque-4.2.10 AdminGuide

OpenSC – tools and libraries for smart cards

Kevin P. Dyer: Format-Transforming Encryption


The Planetary Society

Spies hacked manufacturer of SIM cards

Help pay for toxcore development

Free Your Android!

Antox nightly

Jolla News

Sailfish OS: Linux + Qt5.2 + Wayland + Android libs

DTU: WiFi Watchdog

Browser Spy

Browser Leaks

ErsatzPassword: PAM module using Yubikey HSM


Web search results from Google in complete privacy!


The Aquarius Project

Qhull code for Convex Hull

PARAVT: Parallel Voronoi Tessellation code

Polyhedral Computation

lrs home page

cdd and cddplus homepage

Canadian Astronomy Data Centre

Ned Wright's Cosmology Tutorial

Bayer filter

Sparke and Gallagher

The Aladin Sky Atlas

A Knowledgebase for Cosmology

J.P. Leahy Cosmology Page

Dark Matter

LSB Galaxies


Dust Maps

The Gamma-Ray-Burst Network



Octave Home Page

SGI XFS for Linux

IDL Training

IDL Astro

Federation of American Scientists

FAS Space Policy Project


Lesser's CCD Lab