You are correct about this, and I have updated the code to include the replay protection. (Apparently I became sidetracked before!) I am not sure if the method

You are correct about this, and I have updated the code to include the replay protection. (Apparently I became sidetracked before!) I am not sure if the method that is used in the quicktun source to prevent replay is ideal, and I am fairly certain that I need to revise the method used to generate the nonce too.