A tight bound for exhaustive key search attacks against Message Authentication CodesVinícius G.P. de SÁ, Davidson R. Boccardo, Luiz Fernando Rust and Raphael C.S. MachadoRAIRO-Theor. Inf. Appl., 47 2 (2013) 171-180DOI: https://doi.org/10.1051/ita/2012025