Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- Would it be possible to execute encryption functions in parallel on CBC mode with multiple blocks of messages? How about Decryption?
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- When 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_forward6.4 Based on what you have learned in this chapter, is it possible in SSL for the receiver to reorder SSL record blocks that arrive out of order? If so, explain how it can be done. If not, why not?arrow_forwardAlice encrypts a message using AES, and sends the ciphertext to Bob. Unfortunately, during the calculation of the third block, a lightning struck Alice’s house, corrupting the 2nd bit of the AES output (for the third block). Fortunately, nothing else of the calculation was affected. How much of the plaintext can Bob still recover if the mode of encryption is one of the followings: CBC, CFB, OFB, or CTR?arrow_forward
- Our rdt protocols needed timers for a number of reasons.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_forwardProblem with constructing MAC. The messages X to be authenticated consists of z independent blocks, so that: X = x1||x2|| . . . ||xz, where every xi consists of |xi| = 8 bits. The input blocks are consecutively put into the compression function ci = h(ci−1, xi) = ci−1⊕xi At the end, the MAC value: MACk(X) = cz+k mod 28 is calculated, where k is a 64-bit long shared key. Describe how exactly the (effective part of the) key k can be calculated with only one known message X.arrow_forward
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