“…The encryption and decryption key setup latencies are particularly important in applications where only several blocks of data are encrypted between two consecutive key changes. IPSec (Kent and Atkinson, 1998a;Kent and Atkinson, 1998b;Kent and Atkinson, 1998c) and ATM (Dunn and Martin, 2000), with small sizes of packets, and consecutive packets encrypted using different keys, are two widespread protocols in which the key setup latencies may play a very important role (Gaj and Chodowiec, 1999).…”