Hi tech world
Subtitle: code breakers
By: Ben Hubbard.
Series: Crabtree contact
Publisher: Crabtree
Published: 2010
Place of publication: New York
Language: eng
ISBN-13: 9780778775287; 9780778775508
Subjects: Computer security -- Juvenile literature; Computer hackers -- Juvenile literature; Data encryption (Computer science) -- Juvenile literature
Genres: Juvenile literature
Notes: Includes an index.
Table of contents: title: Nature's code; title: Code makers and breakers; title: The lost code; title: The caesar shift; title: Navajo talkers; title: Enigma; title: Alan Turing; title: Computer codes; title: Computer hackers; title: Gary Mckinnon; title: CAPTCHA; title: Quantum computers; title: Need to know words.