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Comment by mentat | Hacker News Reader

The statement is that that person could have also subverted other methods currently in use, not that that particular person would be impacted.

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Methods from the pre-computer era, from well before the second world war, still in use nearly 100 years later? Is that really plausible?

Scenario: In 1925 an agent is deployed to Russia, infiltrates an intelligence agency, and does something cryptologically noteworthy. It is mentioned in this 'top secret umbra' document. In 1955, said agent, while still acting covertly in Russia, makes further cryptologic "contributions" to Russian intelligence agencies. In 1975 the ciphers from 1955 are still in use, and the USA intercepts information and identifies Soviet spies. In 1995, the USA feeds misleading information to those formerly Soviet spies. In 2016, the USA still cares about the misinformation provided in 1995 to spies identified in 1975 thanks to ciphers from 1955 which were broken by a long-dead agent who started work in 1925.

Seems plausible enough to me.

Now that's a great scenario! There's actually convoluted stuff like that in the non-fiction. They're also still trying to misdirect people on stuff decades old to justify current positions.

Plus it causes the Russians to continue to view others from the time period with possible suspicion. They can't go "oh, that happened 75 years ago and the Anericans have said nothing about it so we must be able to trust that guy and his work"

No the agent that did something 90 years ago, was still there and did something 60 years ago. Which influenced something 30 years ago, which led to something 5 years ago and is still in use.

It's a stretch, but there could be a chain of events that they want to remain hidden. They don't want to hide what happened 90 years ago, they want to hide who did it and what else he may have done in the future or had an effect on.

Okay I can buy that type of scenario. Something along the lines of cperciva's sibling comment. This could be such a case. But I still think it's a stretch. I wonder if they ever redact random things just to distract.

Yep one time pads are still in use and those where invented way before ww1

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