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Cryptography in the Modern Commercial Age Quiz

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Cryptography in the Modern Commercial Age Quiz

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Questions and Answers

What are the five principles proposed by Claude Shannon for a good cipher?

Principle 1: The amount of secrecy needed should determine the amount of labor appropriate for encryption and decryption. Principle 2: The set of keys and the enciphering algorithm should be free from complexity. Principle 3: The implementation of the process should be as simple as possible. Principle 4: Errors in ciphering should not propagate and cause corruption of further information in the message. Principle 5: The size of the enciphered text should be no longer than the text of the original message.

Explain Claude Shannon's five principles of a good cipher as proposed in 1949.

What are the two functions fulfilled by cryptography mentioned in the text?

Cryptography is used to fulfill the functions of Confidentiality and Authentication.

In the context of cryptography, what does confidentiality refer to?

Confidentiality refers to the information contained in a message being available only to the people authorized to access it. Signup and view all the answers

According to the text, what should be possible in terms of authentication for the receiver of a message?

It should be possible for the receiver of a message to ascertain its origins; an intruder should not be able to masquerade as someone else. Signup and view all the answers

What is the role of cryptography in e-commerce as mentioned in the text?

The role of cryptography in e-commerce includes ensuring confidentiality and authentication of information exchanged in electronic transactions. Signup and view all the answers