Data transfer over audio

[brokenman]

I have been following this for a while and thought I would post it here for others. Very interesting. Transfer of data over sound frequency is nothing new for those that remember the high pitch squawks of a dialup modem but this really takes the cake. One unit communicating to another with bluetooth and network/wireless cards removed. Yep, over airgaps. It was uncovered by Dragos Ruiu ... which essentially means ... listen up!

http://arstechnica.com/security/2013/10 ... s-airgaps/

http://blog.erratasec.com/2013/10/badbi ... Crhxkpb8Xc

[Bogomips]

All pretty airy-fairy to me, but more down to earth was link on same page to Password Cracking, which article although 3 yrs old, found to be educational and terribly fascinating.