Answered step by step
Verified Expert Solution
Question
1 Approved Answer
1. Given the following input message and key in hexadecimal, compute the values of the bits in position 13, 37, 28, 5 after 1 round
1. Given the following input message and key in hexadecimal, compute the values of the bits in position 13, 37, 28, 5 after 1 round of encryption of DES (these bits will fall in LE1 and RE1 as shown in below figure) (bit position 1 is the far-left bit, bit 64 is the far-right)
Message = 0123456789abcdef
Key = 1f1f1f1f1f1f1f1f
Output (plaintext) RD 7 = LE, LD,7 = RE, Input (plaintext) LE RE LD 16 = RE RD6 = LE, Round 1 Round 16 FK LE RE LD1s = RE, RD s = LE FK2 Round 2 Round 15 LE RE, LD 14 = RE, RD4 4 = LE LE14 RE14 LD, = RE4 RD2 = LE14 - Ks Round 15 Round 2 - Kys LE15 RES LD, = RES RD, = LES -K16 Round 16 Round 1 -K16 LE36 RE16 LD, = REG RD, = LE6 Input (ciphertext) LE17 REZ Output (ciphertext)Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started