Cogito ergo sum - Oliver's Playground

Dear visitor,

I provide here some information regarding different topics, with which I deal professionally and semi-professionally respectively. Here you'll find a few articles, no more published books and (partial) results of my work. Besides that I keep here my list of publication up to date for the professional audience.

Who "I" is can be determined via the link About Oliver Müller at the horizontal menu on every page of this site.

What the site is can be gathered from the menu item About this site. There you'll find an explanation why, how and for what reason this site was built. A few background information about René Descartes and his statement "cogito ergo sum", which gave this site its name, can be found under this menu item, too.

Via the vertical menu at the left edge you'll reach the respective subjects.

I wish you that the provided information at this site might be useful to you and might stimulate to reflexion and experimenting. I am looking forward to hearing from you. Feedback, constructive critism, flattering laud and suggestions to improve this site are welcome.

Kind regards,
Oliver Müller

My professional web-site you will find at oliver-mueller.com. Currently it is available in German only. I would be glad to welcome you there.

News

2012-03-29: My article "Herkulesaufgabe" about Linux on the IBM mainframe and its emulation by Hercules/390 has been published in iX 4/2012 today.

2012-02-28: The fourth article of my series about "cryptography engineering" has been published at heise/Developer today. It covers in practise the implementation of AES in C on a AVR ATmega. It shows also the simulation of the whole microcontroller system with AVR Studio 4, HAPSIM and com0com.

2012-02-20: The third article of my series about "cryptography engineering" has been published at heise/Developer today. It covers the implementation of AES on 8 bit microcontrollers and uses the Atmel AVR ATmega as sample. It works out the mathematical and algorithmical basics for the upcoming forth article of the series.

2012-01-26: The article "Überlaufschutz - Overflows mit Stack Smashing Protection erkennen" has been published in iX 2/2012. It shows clearly by using debugger sessions how security features like SSP of gcc can help to protect against attacks which utilize stack overflows.

2011-11-09: The second article of my series about "cryptography engineering" has been published at heise/Developer today. It covers the implementation of AES on PC and server systems with at least a 32 bit CPU.

2011-10-13: My articles "Dolly Digital - OpenVMS AXP auf Linux emulieren" and "Code-Rebell - Turnaround-Zeiten minimieren mit JRebel" have been published by the German IT magazine iX in issue 11/2011. The article "Code-Rebel" has been published as cover story.

The article "Dolly Digital" is about how to virtualize OpenVMS-AXP on Linux. It covers migration of existing systems via DECnet and VMScluster.

The article "Code-Rebell" covers JRebel which allows to replace and reload Java classes in Java EE application servers at runtime without any redeployment.

2001-09-29: My series of articles about "cryptography engineering" has started at heise/Developer today. The first article introduces into the mathematical theorie of the Advanced Encryption Standard (AES).

2011-09-06: My trainings about z/OS, MVS/380 and z/Linux as well as secure data exchange between z/OS and Unix/Linux: The dates in the fourth quarter of 2011 in Munich and Essen are fix now. An overview including links for ordering are available at oliver-mueller.com (available in German only).

2011-08-06: The CppUnit distribution for Visual Studio is available for download now.

2011-04-11: The article Installing OS/2 Warp 4 in Virtual PC has been published at this site today. It shows how to provide a virtualized OS/2 environment with full network access and easy data exchange by shared folders.

2011-03-30: The subject "Electronic and Microcontroller" has been added. The first article in this category is about connecting terminal programs to simulated microcontrollers in AVR Studio 4. This is possible by using HAPSIM and com0com.

2011-02-24: Today the article "Adieu Dino" has been published by the German IT magazine iX in issue 3/2011. The article is about rehosting of mainframe applications running under z/OS and z/VSE on MicroFocus Enterprise Server under Unix, Linux and Windows. It discusses the high potential of savings, too.

2010-12-27: The article "Mehrspurig" has been published at Heise Developer today. It is the fourth part of a series about OpenSSL programming in C++. It covers an SSL server implementation with POSIX threads.

2010-12-23: The article "Fehlerträchtig" has been published at Heise Developer today. It is the third part of a series about OpenSSL programming in C++. It covers typical problem of concurrent programs.

2010-10-26: The article "Secure Data Exchange with Mainframes Under z/OS" was published at Dr. Dobb's.

2010-10-11: The article "Neue Heimat - OpenVMS-Systeme auf neuer Hardware" is also available now at Stromasys free of charge: German iX Magazine publishes Stromasys story

2010-08-19: The article "Neue Heimat" about consolidating OpenVMS systems running on old VAX and Alpha hardware was published in iX 9/2010. It covers the migration onto modern Itanium systems and the support with new reengineered parts for VAX and Alpha. But the focus of the article is cross platform virtualization by VAX and Alpha emulators.

2010-08-16: The article "Aufgeschlossen" has been published at Heise Developer today. It is the second part of a series about OpenSSL programming with C++.

2010-08-12: From time to time I was asked for my series about cryptography which I published in Linux-Magazin 13 years ago. These articles were quoted in academic publications here and there. You can find these articles on this site now, because Linux-Magazin permitted me kindly to republish them here. You find the articles under the new item Cryptography. Keep in mind that these articles are available in German only.

2010-08-04: The article "Schlüsselfertig" has been published at Heise Developer today. It is the first part of a series about OpenSSL programming with C++.

2010-06-16: Article "Reanimiert - Mainframes auf dem PC emulieren" was published in iX 7/2010 as cover story. It is about emulating Mainframes on PC computers and is related to MVS/380 and Hercules/380.

2009-10-01: Article "Datenschieberei - Sicherer Datenaustausch mit z/OS (II)", about how to use TLS/SSL secured connections to transfer data with TN3270 (IND$FILE) and FTPS as well as SFTP under z/OS, published in iX 10/2009.

2009-07-25: Article "Nachgerüstet - Sicherer Datenaustausch mit Mainframes unter z/OS" about how to communicate with secure protocols with z/OS published as cover story in iX 8/2009.

2009-04-05: The section "Computer Application" with the first subsection operating systems has been added. A few articles about z/OS, OS/390 and MVS as well as about emulating OS/2 are already available.

2009-04-04: The article "Tunneleffekt" is available at Heise Online-Kiosk, too.

2009-01-22: Article "Tunneleffekt - DNS-Lücken in Hotspot-Netzen" about how DNS tunneling threatens Hotspot and company networks published as cover story in iX 2/2009.

2007-09-07: I still receive requests regarding my (no longer published) book "Parsertechniken in C++" (Parser Techniques in C++). I decided to give the requesters the chance to get this book again. It is now available for download as PDF on the computer science page at no charge.

2007-01-15: Article "Überläufer - Systemeinbruch via Stack-Overflow" about system intrusion via stack overflow published in iX 2/2007.
(The article is purchasable at Heise Online-Kiosk.)

2006-06-15: Article "Nur für Mitglieder" about DACS as access control system for Apache published as cover story in iX 7/2006.
(The article is purchasable at Heise Online-Kiosk.)

2006-04-09: Site goes online.