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> It's old news - it's been done to find internal document leakers for years - I believe even in typewriter days. I knew it was an old technique but I had not
by davorak 13y ago
> It's old news - it's been done to find internal document leakers for years - I believe even in typewriter days.
I knew it was an old technique but I had not thought about it being that old.
If you have any idea of where you heard this I would be interesting in knowing.
- shardling 13y agoI first read about it in an old Tom Clancy novel. A short bit of googling led me to this: http://en.wikipedia.org/wiki/Canary_trap http://en.wikipedia.org/wiki/Canary_trap So the technique was well known by 1987, which certainly qualifies as typewriter days. Apparently it was used in fiction as early as 1972.