Image spam - ASCII to the rescue! - Jordan Nielson; Daniel Medeiros Nunes de Castro; John Aycock (MALWARE, 2008)

Code Obfuscation Using Pseudo-random Number Generators. - John Aycock; Juan M. Gutiérrez Cárdenas; Daniel Medeiros Nunes de Castro (CSE (3), 2009)

Enbug: when debuggers go bad. - David Williams-King; John Aycock; Daniel Medeiros Nunes de Castro (ITiCSE, 2010)

SPoIM: A close look at pollution attacks in P2P live streaming. - Eric Lin; Daniel Medeiros Nunes de Castro; Mea Wang; John Aycock (IWQoS, 2010)

Babel: a secure computer is a polyglot. - John Aycock; Daniel Medeiros Nunes de Castro; Michael E. Locasto; Chris Jarabek (CCSW, 2012)

NSPHD: the polyglot computer. - Daniel Medeiros Nunes de Castro (NSPW, 2013)

Assured Supraliminal Steganography in Computer Games. - Anton Mosunov; Vineet Sinha; Heather Crawford; John Aycock; Daniel Medeiros Nunes de Castro; Rashmi Kumari (WISA, 2013)

Permutation Steganography in FAT Filesystems. - John Aycock; Daniel Medeiros Nunes de Castro (Trans. Data Hiding Multim. Secur., 2015)

Building Babel - Towards a Security System through Co-dependency and Diversity. - Daniel Medeiros Nunes de Castro (2015)