Using Strategies and Word Patterns: The Code Book Answers

Review the excerpt from The Code Book.If Eve parks a van outside Alice's house, she can use sensitive tempest equipment to identify each individual keystroke that Alice makes on her computer. This would allow Eve to intercept the message as it is typed into the computer, before it is encrypted. To defend against tempest attacks, companies are already supplying shielding material that can be used to line the walls of a room to prevent the escape of electromagnetic signals.

Heidi has a writing assignment to connect The Code Book to her own life. Which line from her assignment best demonstrates Heidi’s connection with the text?

One of the author’s purposes in The Code Book is to explain different types of codebreaking to his readers. Which line best demonstrates this purpose?

Read the excerpt from The Code Book.A more recent development is the so-called tempest attack, which aims to detect the electromagnetic signals emitted by the electronics in a computer's display unit.

Read the excerpt from The Code Book.Although traffic analysis, tempest attacks, viruses and Trojan horses are all useful techniques for gathering information, cryptanalysts realize that their real goal is to find a way of cracking the RSA cipher, the cornerstone of modern encryption.The RSA cipher is used to protect the most important military, diplomatic, commercial and criminal communications—exactly the messages that intelligence gathering organizations want to decipher. If they are to challenge strong RSA encryption, cryptanalysts will need to make a major theoretical or technological breakthrough.

Read the excerpt from The Code Book.Other attacks include the use of viruses and Trojan horses. Eve might design a virus that infects PGP software and sits quietly inside Alice's computer. When Alice uses her private key to decrypt a message, the virus would wake up and make a note of it. The next time that Alice connects to the Internet, the virus would surreptitiously send the private key to Eve, thereby allowing her to decipher all subsequent messages sent to Alice.

Read the excerpt from The Code Book.Despite the enormous strength of RSA and other modern ciphers, cryptanalysts are still able to play a valuable role in intelligence gathering. Their success is demonstrated by the fact that cryptanalysts are in greater demand than ever before—the NSA is still the world's largest employer of mathematicians.

Lucy is writing about this excerpt from The Code Book.Only a small fraction of the information flowing around the world is securely encrypted, and the remainder is poorly encrypted, or not encrypted at all. This is because the number of Internet users is rapidly increasing, and yet few of these people take adequate precautions in terms of privacy. In turn, this means that national security organizations, law enforcers and anybody else with a curious mind can get their hands on more information than they can cope with.

A reader can ask, "How would I react if the events in this book happened to me?” to put a text into

Review the excerpt from The Code Book. Cryptanalysts realize that their real goal is to find a way of cracking the RSA cipher, the cornerstone of modern encryption . . . Use the meaning of the underlined words above to understand the sentence.David’s family was puzzled by the short and cryptic note he left on the table.