cryptographyhandbook
nounUK /krɪpˈtɒɡrəfi ˈhændbʊk/
US /krɪpˈtɑːɡrəfi ˈhændbʊk/
A book that teaches you how to make secret codes and keep messages safe.
The spy carried a cryptographyhandbook to learn new ways to hide her messages.
RELATED WORDS
OTHER MEANINGS
2. A reference guide for professionals who design secure computer systems.
The engineer checked the cryptographyhandbook before setting up the new password system.
3. A collection of puzzles and activities about secret writing for students.
Our teacher gave us a cryptographyhandbook full of fun cipher games.
4. A manual explaining the history and methods of secret communication.
She read the cryptographyhandbook to learn how ancient people sent hidden notes.