Einstein in einsteins
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BraboCoin
BraboCoin is an educational cryptocurrency, developed by
Dennis van den Berg, David Dekker, Sophie van den Eerenbeemt and Sten Wessel
as their Bachelor Final Project. It consists of a design and implementation of a simplified
Bitcoin variant, in which the technical and cryptographic details are not hidden (as in most
Bitcoin software) but made visible as much as possible.
Note that "brabocoin.org" has been closed. The brabocoin github site is still there.
A "real" brabocoin:
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Boek
Het boek "Elementaire Getaltheorie
en Asymmetrische Cryptografie" is verschenen bij
Epsilon Uitgaven, juli 2009.
Tweede druk, februari 2011.
Derde druk, september 2016.
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Software
MCR
MCR - Modulaire en Cryptografische Rekenmachine
Vierde versie, 2016.
BCC
BCC - BraboCoin Calculator - is a
Java program that does basic elliptic curve operations and some other useful stuff,
which can be used with BraboCoin to check the cryptographic operations.
Version 1.0 (March 2019).
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My Hagelin BC-38
Serial number 2885.
Comes from the Dutch Army, saved from destruction, thanks to Ruud.
Repaired and made fully functional by the CryptoMuseum Eindhoven,
thanks to Marc and Paul.
See also my apparaten pages.
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The photograph above shows a physical implementation of the by now well known
aperiodical tiling with einstein hats.
Some material data:
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there are 818 einstein tiles, of which 103 have "upside down" orientation
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the tiles are made of triplex, and stick by magnets to a steel whiteboard
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black, white and four intermediate grays of acrylic paint were applied
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size: 102 x 81 cm
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the tiles were made for the
MathFest world record
in aperiodic tiling (Dutch only), held on September 17, 2023 in Brugge, Belgium;
I am grateful to the organizing Platform Wiskunde Vlaanderen for donating these tiles to me
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at the Mathfest three types of tiles were used (see the pictures shown on the above Mathfest site):
darker brown wood, lighter beige triplex, and red plastic; the tiles donated to me are the
lighter beige triplex ones
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Raadsel / Riddle
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Professors on Stage
DJ Benne
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TV
Rekenwonder Willem Bouman bij De Wereld Draait Door, 7 februari 2020.
Ik was controleur.
Matthijs noemde mij "Benne van Weger". Mijn zoon Benjamin had het meteen over "Matthijs de Nieuwkerk".
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Mijn tv-debuut bij Een Vandaag, 31 januari 2019,
over quantum-bestendige cryptografie. Mijn optreden begint op 3:30
en duurt langer dan een hele minuut...
De EenVandaag webpagina
Met Thijs Laarhoven:
Een Vandaag heeft me ten onrechte een upgrade gegeven...
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