Category: Hacking

Simple Android App Hacking

Software hacking has a long history and it was shown in past that – in my opinion – the quality of software in general didn’t get better over decades. This is probably not true for specific projects such as e.g. the OpenBSD kernel which is continuously improved and reviewed because it is open source and …

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Panorama Chart

I am currently working on algorithms for placement of captions on charts. I am testing and implementing some methods. One of them works by sampling the desired area of placement in a circle around the origin of the caption. A premature version of this is already implemented into Smrender since one of the early releases. …

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Android won’t connect to Wifi

Since Android has a Linux-based kernel, the Wifi interface is managed by the wpa_supplicant as on most Unix-based systems. My personal experience during the last years of using wpa_supplicant is that there are many times troubles with it which are hard to debug and even sometimes not reproducable. On the other hand it often works …

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Android, CyanogenMod, and OpenVPN

Although I followed the instructions about how to configure OpenVPN with Cyanogen I failed at first because the certificate “installation” is not what I call user-friendly (Why not simply copy the certificate file to the right location?). OpenVPN is a very secure and feature-rich OpenSource VPN solution. If you Google for it you will find …

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Disable Shutter Sound on Xperia X8

Since several months I use a Sony Ericsson Xperia X8 smart phone. The device is really handy because it is small and fits easily into every pocket but offers all features of a smart phone. By default it comes with Android 2.1 and SE discontinued to offer newer versions. I rooted the device and upgraded …

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Twitter and Content-sensitive Filtering

Originally I intentend to give this post the title “Twitter and Censorship” but then I decided to rename it since censorship is a very hard word. Of course, censorship and filtering are related to each other. But read on about my discovery. At first, I thought it is some kind of network failure, server overload, …

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Mastercard, Visa & Amazon Phishing

Es ist schon einige Monate her, seitdem wir im Rahmen eines Kurses auf der FH St. P├Âlten in die “Geheimnisse von SMTP & Co” eingetaucht sind. Ich habe dabei auch versucht die Teilnehmer des Kurses zu animieren ihren Spam zu “lesen” ­čśë …nat├╝rlich nicht um danach selbst Opfer einer Phishing-Attacke o.├Ą. zu werden, sondern um …

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Bei A1 ist Security noch nicht angekommen

Bei A1 ist der Begriff Security noch nicht angekommen. Durch Zufall kam ich k├╝rzlich bei einem Kunden mit dem A1 Webspace Business in Ber├╝hrung. Im Produktnamen ist der Begriff Business zu finden, was darauf schlie├čen l├Ąsst, dass es sich eben um ein Profiprodukt handelt. Aber was genau zeichnet es aus? Gute Frage, denn der Webspace …

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RF_KILL sucks!

This is not the first time that I have troubles with the RF-kill “feature” as reported on this blog. Recently I set up an old notebook. I did a clean Linux network install of Debian Lenny. Everything worked fine, all hardware was detected properly. But it took not long to find out that the wifi …

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Pdflatex does not compile Beamer class documents

For several years now I use the Beamer class to create slides with Latex. For whatever reason pdflatex does not compile my Latex documents anymore. It stops with the following error message: ! Undefined control sequence. \Gm@lmargin ->\Geom@lmargin I found out that this seems to be caused by an update of the geometry package. The …

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