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- Let M be the plaintext message M = MALAYSIA and the private key, K = ISSOGOOD. Using the appropriate steps of DES operation, get the final output of the key for round 1 with the permutation compression (PC) table provided below, In round 1, get the output for the XOR operation of plaintext and the key, according to the DES operation. a) Based on the output above, explain the next process using the S-box table below, and show the output from this operation. DO NOT COPY and PASTE!Let M be the plaintext message M = MALAYSIA and the private key, K = ISSOGOOD. Using the appropriate steps of DES operation, get the final output of the key for round 1 with the permutation compression (PC) table provided below, In round 1, get the output for the XOR operation of plaintext and the key, according to the DES operation. a) Based on the output above, explain the next process using the S-box table, and show the output from this operation.Let M be the plaintext message M = MALAYSIA and the private key, K = ISSOGOOD Using the appropriate steps of DES operation, get the final output of the key for round 1 with the permutation compression (PC) table provided below, For round 1, get the output for the XOR operation of plaintext and the key, according to the DES operation. Based on the output above, explain the next process using the S-box table, and show the output from this operation. Based on the output of of 4(a), explain the next process using a straight permutation table, and show the output from this operation.
- Question: Using the simplified RC4 Algorithm of 8 bytes (rather than the full 256 bytes), find the final Keystream and Cipherpext of the following Input string: S-Array of length 8, [S0 S1 S2 S3 S4 S5 S6 S7] = [7 6 5 4 3 2 1 0] Key, K = [3 1 4 1 5] Plaintext, PT = [6 1 5 4] Hint: For the simplified stream generation, you can use this pseudocode (only up to the PT length): /* Initialization */ set i and j = 0 for i = i + 1 to length of PT j = j + S[i] mod 8 swap S[i], S[j] t = S[i] + S[j] mod 8 Keystream = S[t] end forCan you please show the shifts for the encrypt & decrypt in this format? For example, like this : Example:ABCDEFGHIJKLMNOPQRSTUVWXYZ Row 1FGHIJKLMNOPQRSTUVWXYZABCDE Row 2 If the plaintext to encrypt is:THIS IS THE ANSWER The ciphertext becomes:YMNX NX YMJ FSXBJW This is for me to help understand and to redo the problem for studying. Thank you!!**Please do A or C** a. Compute CBC-MAC for a message of 16 bits, “8642” (in Hexa). Assume a block size of 8 bits with an IV=F1 (in hexa). For simplicity, assume the encryption to be a simple XOR of the key with the plaintext. Let the encryption key be B4 (in Hexa). (Hint: Divide the message into blocks of 8 bits each; XOR each block with the previous cipher output; then encrypt this with the key. For the first block, XOR it with IV. Details in pages 325-326 Ch.12 of the textbook) b. Suppose Alice computes the Secret prefix MAC (page 322: secret prefix MAC(x) = h(key || x)) for the message ”AM” (in ASCII) with key “G” (in ASCII) that both Alice and Bob know. The hash function that is used is h(x1x2x3)= g(g(x1 XOR x2) XOR x3 ) where each xi is a character represented as 8 bits, and g(x) is a 8-bit string that is equal to the complement of bits in x. For example, g(10110011) = 01001100. The MAC is 8 bits. (8-bit ASCII representation of the characters is given below.) What is the…
- 3. For this task you are going to generate a key and use stream cipher. (a) Use the quadratic residue pseudorandom generator (BBS)on the prime numbers p and q of your choice, where 5000 < p, q < 9000, to generate the first five bits of your key k0, k1, k2, k3 and k4. (b) Generate a key sequence of length 40 by using the recurrence relation xn+5 = xn+4 + xn+2 + xn+1 + xn (mod 2), n ≥ 0 where the initial values are the key generated in (a). (c) Encode your last name by using the ASCII code. Use the stream cipher and the key you generated above to encrypt your last name.above question : Suppose that we have the following 128-bit AES key, given in hexadecimalrepresentation:54 77 6F 20 4F 6E 65 20 4E 69 6E 65 20 54 77 6F Construct the round key for the first round. Main Question: Complete the first round of the encryption (128-bit AES) of the following plaintext by using the round-key you generated above:63 72 79 70 74 61 6e 61 6c 79 73 69 73 6f 6e 65In the AES Project, you should change the secret key of the AES by a dynamic key generated by RC4 after every 1024 bits, remember you should encrypt an image of 512*512*3 bytes, moreover, the used mode of operation should be CBC mode, Finally, use the attached figure to find the Number of cycles per byte and the encryption throughput?
- 1. (A=0,Z=25) Encode: BE HONEST using the encrypting function f (p) = (p+ 3) mod 26. 2. Decode: GPWJO if the original message was encrypted using f (p) = (7p+ 10) mod 26. 3. What is the 6th term in the following sequence? 11, 15, 19, 23, ___, Blank 1 4. Using the Euclidean algorithm to compute for the gcd (1283, 7295), what is the value of the last nonzero remainder? 5. Is the given integer 9321 a prime or composite?What will be the value of the Parity flag after the following lines execute?mov al,1add al,3The following message uses a direct mapping of letters to numbers (i.e. A-1, B=2, c-3, etc.).Using the values D=17 and m=21, decrypt the following message:10 15 12 18 1 3 17 14 7 18 14 17 17 9 18 14