Bibliografía

ESP

ESPASA, Diccionario Enciclopédico Abreviado.
ESPASA.

Gra99

Ian Graham.
Putting privacy into context: An overview of the concept of privacy and of current technologies.
1999.
http://www.utoronto.ca/ian/privacy/privacy.html.

Haf

Katie Hafner.
Do you know who's watching you? do you care?

oxf

Oxford English Dictionary.
Oxford University Press, second edition (electronic database version) edition.
http://www.oed.com/.

Sin

Simon Singh.
Los códigos secretos.
Debate. Pequeña Gran Historia.