short answer only please

(1 point) This question concerne block cipher padding Suppose the biock cipher has a block size of 20 byles. A oertain message ends with a part al block which is 17 byles We must reversibly pad out the message to use some block cpher modes, such as CEC (even if the last block is full) Consider the foliowng padding strategy. Append a single byie with value 128 , and then as many zero byotes as required to make the overab lengeth a mutiple of 20. not put a leading 0x as this has been written already