Protecting Security Information in Distributed Systems. - Claus Fritzner; Leif Nilsen; Åsmund Skomedal (S&P, 1991)

Scalable Revocation in Hybrid Ad Hoc Networks: The SHARL Scheme. - Mona Holsve Ofigsbø; Anne Marie Hegland; Pål Spilling; Øivind Kure; Leif Nilsen (J. Networks, 2008)

Reducing the Cost of Certificate Revocation: A Case Study. - Mona Holsve Ofigsbø; Stig Fr. Mjølsnes; Poul E. Heegaard; Leif Nilsen (EuroPKI, 2009)

Genetic algorithm attack on Enigma's plugboard. - Åvald Åslaugson Sommervoll; Leif Nilsen (Cryptologia, 2021)