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Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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
Transcribed Image Text:Comparing cypher block chaining to cypher feedback mode in terms of the number of encryption
operations necessary to transport a large file, cypher block chaining is more efficient than cypher
feedback mode.
Which one is more efficient, and how much more so?
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- How may block and stream ciphers exchange keys, and why should they be different?arrow_forwardThe definition of a Shift Cipher can be expressed as follows:Def. Let x, y, k ∈ Z26 with the encryption operation as ek(x) ≡ x + k mod 26 and thedecryption operation as dk(y) ≡ y - k mod 26.Given the provided letter encoding, what would be the encoding of the plaintext word ATTACKafter applying a shift cipher with a k=17?arrow_forwardWhen it comes to transferring huge files, you should investigate the distinctions between cypher block chaining and cypher feedback mode.Which proportion do you believe produces the best results?arrow_forward
- Comparing cipher block chaining with cipher feedback mode in terms of the number of encryption operations necessary to transport a large file reveals some interesting differences.Which of these methods is more effective, and by what percentage?arrow_forwardIn modern encryption, plaintext is encoded in binary form. Each bit in a bit stream is encrypted into its matching ciphertext, while bits in a block stream are grouped together to create groups of bits prior to encryption.arrow_forwardEncrypting with TDEA and a single key is pointless, because it is equivalent to encrypting with the original "single" DES, which is no longer considered strong enough to resist feasible attacks. In your own words (do not quote in any way from any source), briefly explain why decrypting with TDEA and a single key was a useful operation when TDEA was developed.arrow_forward
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