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    I loved reading the process behind cracking this. I do not have a ton of background about the state of previous efforts - was this already solved/decrypted by the FBI? Here’s what stood out:

    David submitted this solution to the FBI Cryptanalysis and Racketeering Records Unit (CRRU) on Saturday, December 5, 2020. Shortly after, the FBI was able to officially confirm the validity of our solution.

    Was it confirmed because they already solved it (and kept it to themselves)? Was it confirmed because they agreed that the approach was sound and yielded information they could confirm via other evidence?

    Any which way, the results give surprising insight into the mindset and twisted motivations of the killer. I have to wonder if this unlocks any investigative avenues or anything. They say it’s an open case, but it feels like something that will never have a satisfying resolution.

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      “Verified” in this case means that they followed their steps and arrived at the same solution and gave their approval that the approach was sound. One of the people who collaborated on the solution made a very good video detailing the process: https://www.youtube.com/watch?v=-1oQLPRE21o

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        AFAIK, the FBI had not cracked it prior to this, which makes this sort of thing even cooler.

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          You never know. Look the case with Golden State killer who got caught thanks to one of their relatives doing a DNA test. While it would be interesting to get into the mind and motives of the killer while they are still alive, identifying that person after they have died would also bring some satisfaction. So I wouldn’t rule out that one day authorities might actually find the killer.