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by acatton 711 days ago
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/2194b2c64de65eed119ab...