I'm a telecommunications engineer with a strong interest in mathematics and its various applications. I was born in 1977, in Leningrad, USSR on the eve of St. Patrick's day. Since then, I have lived, worked and studied in several countries, while the world has changed beyond recognition many times over with no end in sight. Fortunately, 2×2=4 everywhere all the time.
My CV is available here in plain text together with its digital signature.
Nagy Dániel Rákospatak park 2, 15. Budapest, H-1142 Hungary
firstname.lastname@example.org (ePoint System) email@example.com (Alma Mater)
Despite the recent advances in information technology and electronic commerce, online payment is still a mess. The Internet is infested with advertising, because very often that is the only way to finance a website or a community service. Individuals and businesses involved in digital commerce regularly suffer heavy losses to credit card fraud and identity theft, which pose an ever-increasing risk on the Internet. Yet, when we do business online, we are often forced to disclose an incredible amount of very personal information to our business partners — complete strangers in many cases.
The primary reason for the above situation is that there is no cheap, secure, yet anonymous method of on-line payment. Many attempts at introducing the digital equivalent of cash failed. And not for the lack of trying!
The challenges are enormous, as the Internet is radically different from our usual marketplaces: there is no single jurisdiction, no physical presence, and no easy way to demonstrate the ability to follow up on promises. And perhaps most importantly, there are no laws of conservation; pieces of information can be multiplied without restrictions at practically zero cost. One who gives information away is still in possession of it after the act.
Hence, I believe that a successful digital medium of exchange should be in many ways radically differnet from money, while at the same time retaining some of its properties. Correctly identifiing these properties is not easy and the pitfalls are numerous. The ePoint System is an ambitious project aimed at overcoming these difficulties and providing the Internet with a usable medium of exchange and credit.
Without the freedom and the abundance provided by Free and Open Source software (FOSS), life would be much harder and definitely less fun. As someone who regularly benefits from the work of the countless people contributing to the body of FOSS, I feel the moral obligation to share with the community the software that I write and consider useful for others, under the same fair terms.
I write a lot. It helps me in organizing my thoughts and feelings, in coming to terms with myself and the world around me. However, most of my pennings are not meant to be published or are not up to my own (admittedly not too high) literary standards.
Here are some writings of mine that I am comfortable sharing with the public. They are all work in progress, thus suggestions and criticism are most welcome.
The Stars Are Cold Toys, Sci-Fi novel (from Russian into Hungarian)
Imagine, pacifist anthem (from English into Hungarian)
The Time Credit Union, Sci-Fi short story (from Russian into Hungarian)
Good Morning, Chimeras, Sci-Fi short story (from Russian into Hungarian)
A first-year undergraduate course at
Budapest University of Technology and
Economics instructed by professor
András Recski, comprising
selected topics from algebra, combinatorics, complexity theory and number
theory. As far as I know, its name has been changed to something like
Introduction to Computer Science or
Elements of Computer Science
depending on the target audience.
I was leading tutorial sessions, grading midterm and final exams and preparing problems for these. And proctoring, of course.
A second-year undergraduate course at Queen's University instructed by professor Leslie Roberts. Calculations and error estimation with floating-point numbers, interpolation, numerical solutions of systems of linear equations and differential equations. Number-crunching, in short.
My duties included leading tutorial sessions and laboratory excercises.
A second-year undergraduate course at Queen's
University instructed by professor
Quoting his definition:
A course in calculus. Now with extra variables!.
While teaching it, I was convinced that the official title was
I have led some tutorials, graded some homework assignments and invented problems for these. I have also contributed some material on the Wave Equation, drawing on the experience of the previous course.
Combined fourth-year undergraduate and graduate course at Queen's University instructed by Ana Maria Savu. Probabilistic modeling, Markov-chains, queueing theory, etc. A very challenging course on both sides of the pulpit.
My duties included tutorials and homework grading.
Co-instructed this combined fourth-year undergraduate and graduate course at Queen's University with professor Tamás Linder. Theoretical and practical aspects of lossy and lossless data compression: Scalar and vector quantization, entropy coding, algorithms — design and analysis.
I was giving the lectures.
Elective course at Eötvös Lóránd University. Basic concepts of security engineering and applications of various cryptographic techniques, with an emphasis on physical security.
I am the instructor of this course.
On Digital Cash-Like Payment Systems
OpenPGP-based Financial Instruments and Dispute Arbitration
Experimental Study of a Binary Block-Sorting Compression Scheme
Higher-Order Markov Modeling of Block-Markov Sources
Convergence Rates in Higher-Order Markov Modeling of Block-Markov Sources
Lossless Compression and Alphabet Size