> physical letter
ECDH using paper letters? π
This is awesome. The bandwagon effect is a big concern for me in particular. I remember I asked for something similar on security dot stackexchange but received no satisfying response.
I'm not sure if I got it right: a sealed relay just doesn't allow REQ until a deadline? Or it's something more complex, something similar to NIP-59?
A relay operator (or somebody malicious that gets access to it) still could leak intermediate results if they are available there. Did you possibly mean running the entire relay in the TEE?