Author Archives: krzysztoftomaszewski

About krzysztoftomaszewski

I've got M.Sc. in software engineering. I graduated in 2005 at Institute of Computer Science, Warsaw University of Technology, Faculty of Electronics and Information Technology. I'm working on computer software design and engineering continuously since 2004.

Security holes in Intel CPUs

SHORT: This is my collection of links to articles about Intel CPU/chipset security holes. For some longer time I’m interested in security holes/flaws in PC hardware as I find such things a real nightmare from software developer point of view. … Continue reading

Posted in BIOS, hardware, security | 2 Comments

Google App Engine, Java, JPA 2, Spring Framework, Maven

DISCLAIMER: This was going (in 2014!) to be a full tutorial but at some point I’ve lost motivation in digging in the Google App Engine. Actually I was so tired with this GAE data store that I felt really relieved … Continue reading

Posted in GoogleAppEngine, Java, Spring | Tagged , , | 1 Comment

RSA signatures in Java with Bouncy Castle

This is a complete guide, starting from RSA key pair generation into PEM files, through loading private/public keys from files into proper Bouncy Castle objects, to digital signature creation and verification – all using Bouncy Castle. No JCA. How to … Continue reading

Posted in Java, security | Tagged , | Leave a comment

Sequence of digits from natural numbers

Around a year ago I was taking a part, as a candidate, in a recruitment process in one of the world’s biggest and most innovative software companies. One question was to propose an algorithm to solve the following problem: Given … Continue reading

Posted in Java | Tagged , | Leave a comment

JavaScript, comparing numbers and null

Last time I’m programming quite a lot in JavaScript. And I discovered this kind of inconsistency when comparing a null value with numbers. Let’s consider this code in JavaScript: I was assuming null value compared to numbers will behave in … Continue reading

Posted in JavaScript | Leave a comment

Scala like Perl?

These days really many people (in the software development world) are fascinated by Scala. And on the other hand it’s practically impossible to find someone feeling similar about Perl. This is somehow surprising for me as I see similarities between … Continue reading

Posted in Uncategorized | Tagged , , | Leave a comment

Gaming controllers for Linux!

Surprisingly I do sometime play computer games. Of course under Linux! With my sons I like car racing games so I needed a gaming wheel or a gamepad. And here the question arises to which I came as well: Which … Continue reading

Posted in hardware, Linux | Tagged | Leave a comment