Appendix A. Answers
Chapter 1
1. C. Explanation: You should encrypt the folder and all its contents. Hashing reduces a message to a hash value. Hashing is a method for determining whether the contents of a file have been changed. But hashing does not provide a means of protecting data from editing. Decryption converts ciphertext into plaintext. A digital signature is an object that provides sender authentication and message integrity by including a digital signature with the original message.
2. A. Explanation: Key clustering occurs when different encryption keys generate the same ciphertext from the same plaintext message. Cryptanalysis is the science of decrypting ciphertext without prior knowledge of the key or cryptosystem used. A keyspace ...
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