Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Q7. Consider the diagram below and answer the following questions relating to block ciphers: Initialization Vector (IV) Key → Plaintext ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ block cipher encryption A ‒‒‒‒‒‒‒ Key block cipher encryption Plaintext ‒‒‒‒‒‒‒‒‒‒‒‒‒ Key → Ciphertext Plaintext block cipher encryption ☺ ‒‒‒‒‒‒‒ Ciphertext What block cipher mode of operation is shown? Which operation (encryption/decryption) is described in the diagram? Describe the change required in the diagram to perform the reverse operation (encryption decryption) Using this block cipher mode, which of the operations is faster (if any)? Briefly explain why this is so Ciphertext
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Transcribed Image Text:Q7. Consider the diagram below and answer the following questions relating to block ciphers: Initialization Vector (IV) Key → Plaintext ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ block cipher encryption A ‒‒‒‒‒‒‒ Key block cipher encryption Plaintext ‒‒‒‒‒‒‒‒‒‒‒‒‒ Key → Ciphertext Plaintext block cipher encryption ☺ ‒‒‒‒‒‒‒ Ciphertext What block cipher mode of operation is shown? Which operation (encryption/decryption) is described in the diagram? Describe the change required in the diagram to perform the reverse operation (encryption decryption) Using this block cipher mode, which of the operations is faster (if any)? Briefly explain why this is so Ciphertext
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