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Turning Down Upspin Infrastructure
With regard to alternatives to a centralized keyserver, there was a relevant discussion at https://github.com/upspin/upspin/issues/614 a year ago. In short, the proposal is to keep sets of known_keys at each client and also sets of known_keys at dirservers, with some automation to warn users of changes and maintain consistency.
The combination of strong end-to-end encryption with the convenience of upspinfs letting you run existing apps effortlessly has been great. Leaving aside keyserver, there continues to be uncertainty about how far away a cryptographically-relevant quantum computer might be, but I've heard from a credible source that it is now likely less than ten years off. Given the effort needed to implement the two critical steps above compared to the size of the community, it seemed time for Upspin to join its Authors in retirement.
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