infraruby

Ah! Wouldn't that be "attackers can replace an original ciphertext with two chosen blocks"?

> I'm surprised this is the thing you want the link for, and not "1 biased bit destroys the security of a 256 bit nonce where the other 255 bits come from secure random".

IIRC the link for that is in your hiring post!

Do you have a link explaining this?

  def f(n = 16)
    n
  end

  p f # => 16
  p f(nil) # => nil

  require "securerandom"

  module SecureRandom
    F = File.open("/dev/urandom")

    def self.random_bytes(n = nil)
      F.read(n || 16)
    end
  end

Yes, combining methods works even better! It's far from saying that the best way is "to just talk to them".