Article About a Secret Communication Channel in 1980's South Africa
27 Dec
2013
27 Dec
'13
1:38 p.m.
This should be of interest to the list. I must credit the find to Schneier's blog: https://www.schneier.com/blog/archives/2013/12/operation_vula.html "Talking to Vula http://www.anc.org.za/show.php?id=4693" (http://www.anc.org.za/show.php?id=4693) is the story of a 1980s secret communications channel between black South African leaders and others living in exile in the UK. The system used encrypted text encoded into DTMF "touch tones" and transmitted from pay phones.
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Alex J. Martin