The screen was on, just not private due to tempest snooping. Private strings wer... | Hacker News

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cowbellemoo on Oct 23, 2016 | parent | context | favorite | on: When Your Screen Breaks in the Himalayas

The screen was on, just not private due to tempest snooping. Private strings were output using Morse flashes from HD activity LED. :)

triplesec on Oct 23, 2016 [–]

I haven't reread it since about 2000 so you are now likely to be right. I was sure there's another bit where he's doing things blind, but memory serves me badly! I do recall he needed to make sure anyone reading his screen remotely couldn't read his code. Time to dip in for another look

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