The MARVIN message authentication code and the LETTERSOUP authenticated encryption scheme - Simplicio Junior, Marcos Antonio; Barbuda, Pedro d'Aquino F. F. S; Barreto, Paulo Sérgio Licciardi Messeder; Carvalho, Tereza Cristina Melo de Brito; Margi, Cíntia Borges (Security and Communication Networks, 2009)