Force of habit. No particular reason, "4kiB feels like a nice number", cargo culting. Choose one :) . It doesn't matter if you have more than 256 bits, as your

Force of habit. No particular reason, "4kiB feels like a nice number", cargo culting. Choose one :) . It doesn't matter if you have more than 256 bits, as your key file gets hashed with SHA256 at the end[1]. It could be 5GiB it would be the same. So yes, you're right to mention that more bits don't add more security. [1] https://github.com/Tarsnap/spiped/blob/2194b2c64de65eed119ab01f06c8adb2233caab8/lib/proto/proto_crypt.c#L114 https://github.com/Tarsnap/spiped/blob/2194b2c64de65eed119ab...