Posts from August 2019

• Investigating a MIDI music DRM system (c. 1998)

  24 August 2019 (updated 28 August 2019) | copyright drm reverse engineering obfuscation security | Comment

  Background

  This post concerns a DRM system used in a proprietary JavaScript-based music player. The music is sequenced locally in the client based on instrument and note data, à la MIDI. The music player does not have any export capabilities, but like the previous instalment… »

• Single Transferable Vote counting sheets and worksheets (Creative Commons)

  21 August 2019 (updated 23 August 2021) | elections voting systems proportional representation | Comment

  

  STV count sheet:

  • Narrow cells
  • Wide cells

  

  • STV exclusion worksheet

  

  • STV surplus worksheet

• Investigating a legacy document delivery DRM system – Part 2

  17 August 2019 | copyright drm reverse engineering obfuscation security | Comment

  Last time, we investigated the HTML5 viewer for a document delivery DRM system, rehosting the viewer to give us unlimited access to documents – but only through the standard print procedure, which inserts watermarks and copyright information. This time, we'll investigate how we can… »

• Investigating a legacy document delivery DRM system – Part 1

  17 August 2019 | copyright drm reverse engineering obfuscation security | Comment

  Background

  This post concerns a DRM system used in an online document delivery platform (think PDFs, but proprietary), established circa 2000 and still in popular operation. Documents purchased through the platform are delivered in a proprietary encrypted file format, which can be opened using a… »