From Wikipedia: In cryptography, a code is a method used to transform a message into an obscured form so it cannot be understood. Special information or a key is required to read the original message. The usual method is to use a codebook with a list of common phrases or words matched with a codeword. Encoded messages are sometimes termed codetext, while the original message is usually referred to as plaintext. ~ Terms like code and in code are often used to refer to any form of encryption. However, there is an important distinction between codes and ciphers in technical work; it is, essentially, the scope of the transformation involved. Codes operate at the level of meaning; that is, words or phrases are converted into something else. Ciphers work at the level of individual letters, or small groups of letters, or even, in modern ciphers, with individual bits. While a code might transform "change" into "CVGDK" or "cocktail lounge", a cipher transforms elements below the semantic level, i.e., below the level of meaning. The "a" in "attack" might be converted to "Q", the first "t" to "f", the second "t" to "3", and so on. Ciphers are more convenient than codes in some situations, there being no need for a codebook, with its inherently limited number of valid messages, and the possibility of fast automatic operation on computers. ~ Codes were long believed to be more secure than ciphers, since (if the compiler of the codebook did a good job) there is no pattern of transformation which can be discovered, whereas ciphers use a consistent transformation, which can potentially be identified and reversed (except in the case of the one-time pad).

How to Write and Decode Top-Secret Messages (Codemaster, No. 1)

MILLER, MARVIN

Children's Books

Scholastic. Inc.

Provides instruction to eight card tricks.

Your Own Super Magic Show

scholastic

Based on one of the most popular segments in Boy's Life magazine, a collection of codes offers the secret to writing and solving codes, includes a decoder wheel, and presents such challenges as the Pigpen code and the Mixed-up Math Code. Original.

How to Write and Decode Secret Messages

Scholastic Paperbacks

Based on one of the most popular segments in Boy's Life magazine, a second collection of codes offers the secret to writing and solving codes, along with a decoder card, and presents such challenges as the Playing Card Code.

How to Write and Decode Secret Messages (Codemaster , No 2)

Youth. For YOU to solve the baffling cases - 10 courtroom mysteries with illustrated clues.

You Be the Jury #02

T*A*C*K Against Time (T*A*C*K, No 4)

Robinson, Nancy

Offers young sleuths seven cases to solve, providing clues for readers to put into the jigsaw puzzle at the end of each

You Be the Detective (Jigsaw Puzzle Mysteries)

Activities, Crafts & Games

You Be the Jury: Courtroom III

A selection of courtroom mysteries challenges young readers to examine the evidence, spot the clues, and decide the fate of defendants in The Case of the Nosy Neighbor, The Case of the Barking Dog, and eight others. Reissue.

You Be the Jury Courtroom IV

The author of the popular "You Be the Jury" series of books presents ten casefiles in a work that encourages budding sleuths to examine the evidence and solve the crime. Original.

Who Dunnit?: How to Be a Detective in Ten Easy Lessons

Literature & Fiction

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Books by MILLER, MARVIN