Using Strategies and Word Patterns: The Code Book Answers

How is the word protection different from the word protect?

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?

Review the excerpt from The Code Book.In 1998, a report by Wayne Madsen revealed that the Swiss cryptographic company Crypto AG had built backdoors into some of its products, and had provided the U.S. Government with details of how to exploit these backdoors. As a result, America was able to read the communications of several countries. In 1991 the assassins who killed Shahpour Bakhtiar, the exiled former Iranian prime minister, were caught thanks to the interception and backdoor decipherment of Iranian messages encrypted using Crypto AG equipment.

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Read the excerpt from The Code Book.The Trojan horse, another software trick, involves Eve designing a program that appears to act like a genuine encryption product, but which actually betrays the user.

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.

Jac is reading this paragraph from The Code Book.Mathematicians have been studying factoring for centuries, and modern factoring techniques are not significantly better than ancient techniques. Indeed, it could be that the laws of mathematics forbid the existence of a significant shortcut for factoring.

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.

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.