Nice. I'd previously written a similar FUSE-based one-way filesystem, but I never did publish it. "Go laziness!" The two applications that caught my eye were

Nice. I'd previously written a similar FUSE-based one-way filesystem, but I never did publish it. "Go laziness!" The two applications that caught my eye were "home security cameras" (which the docs allude to) and secure telemetry. You have a device (say, a drone) that logs telemetry data, but if the drone is lost, the data cannot be recovered by a third party without the private key.