Intercept Chrome network traffic with proxy server

In contrast to Firefox, Chrome does not provide an obvious interface to redirect the network traffic through a local proxy server. Of course, it is possible to change the systems proxy. However, then all traffic will be sent through that proxy, and not only the browser traffic. Therefore, Chrome provides several (over 1000) command line … Read more

Changing your MAC address in Windows (cont.) Python Script

After writing the previous blog post about manually changing the MAC address of a Windows system, I decided to create a small Python script which would ease up the whole process. The scripts basic functionality List all network interfaces Change the MAC address of an interface Restart the interface Reset a changed MAC back to … Read more

Changing your MAC address in Windows

A media access control address (MAC address) is a unique identifier assigned to a network interface controller (NIC) for communications at the data link layer of a network segment. Unlike IP addresses, provided by your ISP, router or network admin, the MAC address is assigned by the manufacturer of the network interface controller. However, it … Read more

Attacking AES CBC non-existent integrity protection

Modes of operation, a very short recap The Advanced Encryption Standard (AES) is very likely the most prominent block cipher these days. Since most messages which should be encrypted are larger than 128 bits (which is the block size of AES), a so called mode of operation is used. A mode of operation describes how … Read more

Budget “USB Rubber Ducky” – Digispark Attiny85

A USB Rubber Ducky is a keystroke injection tool disguised as a generic flash drive. The most prominent one being Hak5’s USB Rubber Ducky. Its general idea is to look like a normal USB flash drive while acting like a keyboard, with prerecorded key strokes, when being attached to a computer. One can program it … Read more