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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(4 points) In this problem we will work through a round of DES. For notational simplicity, assume it is the first round. Please enter all answers as strings of 0's and 1's. The input is the 64 bit block 0000100000010000000000000000000010010000000000000000000000000000 Suppose that the subkey for the current round is this 48 bit number: 000000000000000000000010000000000000000000000000 What does the 64 bit state look like after the IP transformation is applied to the input? 0000000001100010000000000000000000000000100000000000000 Now find Lo and Ro, the left and right halves of the state. Lo = 00000000000110000100000000000000 Ro = 00000000000000100000000000000000
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Transcribed Image Text:(4 points) In this problem we will work through a round of DES. For notational simplicity, assume it is the first round. Please enter all answers as strings of 0's and 1's. The input is the 64 bit block 0000100000010000000000000000000010010000000000000000000000000000 Suppose that the subkey for the current round is this 48 bit number: 000000000000000000000010000000000000000000000000 What does the 64 bit state look like after the IP transformation is applied to the input? 0000000001100010000000000000000000000000100000000000000 Now find Lo and Ro, the left and right halves of the state. Lo = 00000000000110000100000000000000 Ro = 00000000000000100000000000000000
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