Search results for “[subject: security-cryptography-encryption]”

• Author(s): Martin Gardner • Publisher: Dover Publications • Publisher Imprint: Dover Publications • BISAC: Questions & AnswersFrom the Back Cover"A fascinating, challenging book."―A.L.A. BooklistLearn to use the most important codes and met...

• Author(s): Gerald Jenkins • Publisher: Tarquin Group • Publisher Imprint: Tarquin Group • BISAC: Teaching - Subjects - Social ScienceMake this collection of seven ingenious paper gadgets which introduce and explain many of the concepts used in ...

• Author(s): Brian Thomas • Publisher: SL Editions • Publisher Imprint: SL Editions • BISAC: Computers - GeneralDiscover the exciting world of cryptography-a thrilling mix of puzzles, mystery, and creativity! This book invites kids to dive into t...

• Author(s): Brian Thomas • Publisher: SL Editions • Publisher Imprint: SL Editions • BISAC: History - GeneralDiscover the exciting world of cryptography-a thrilling mix of puzzles, mystery, and creativity! This book invites kids to dive into the...

• Author(s): Bud Johnson • Publisher: Dover Publications • Publisher Imprint: Dover Publications • BISAC: GeneralNo, it's not a message from outer space! Just read it backwards, starting from the bottom line, to discover what this specially coded...