Ah Harald still at large! I met him in Austria where he gave a training on OsmocomBB (2010? Found the link [0]) and blew me away with his acquired knowledge of GSM. I worked for a large European mobile provider and it was very uncommon to meet people outside of that bubble to be interested, let alone knowledgeable about the domain.
Mind you, at that time there where hardly or no easy accessible & readable write-ups on the subject. Piles and piles of badly formatted and cryptic worded PDF's had to be obtained, read and understood. He did it.
Remember, this was in the same year Karsten Nohl gave his BlackHat presentation on cracking A5/1. Exciting times :)
Mind you, at that time there where hardly or no easy accessible & readable write-ups on the subject. Piles and piles of badly formatted and cryptic worded PDF's had to be obtained, read and understood. He did it.
Remember, this was in the same year Karsten Nohl gave his BlackHat presentation on cracking A5/1. Exciting times :)
[0] https://deepsec.net/docs/Slides/2010/DeepSec_2010_OsmocomBB.... [1] https://srlabs.de/wp-content/uploads/2010/07/100729.Breaking...