Describe the DES data encryption algorithm for plaintext with a length of 64 bits and a key length of 56 bits.
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Describe the DES data encryption
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- For AES with a 128 bit block length and a 128-bit key length, what is the output of the first round of AES if the plaintext consists of 128 1's and the first subkey also consists of 128 zeroesIllustrate the DES single round Encryption (only initial Permutation, expansion and XOR processes) using the following Block and key: Text Block: 11010111 10000111 00111011 10011010 11010111 10110100 00101010 10100111 Key for the round: 10011010 10000111 00111011 10011010 11010111 11010111 A- BI E E E ECreate and illustrate symmetric cipher system using shift cipher
- Discuss Stream CiphersConsider AES with 128-bit block length and 128-bit key length. What is the output of the first round of AES if the plaintext consists of 128 ones and the first subkey also consists of 128 zeros?Consider a 64 bit Block Encryption algorithm E. Suppose you have encrypted a 64 byte message Mı, M2, .. M64. Show / explain using diagrammatic forms how you would decrypt the message using CBC and OFB-16. Use an 8 byte IV: I1, I2, ... Is.
- Suppose a message is 5000 bits long. If it is to be encrypted using a block cipher of 64 bits, find both the size of the padding and the number of blocks needed.Compute the bits number 4, 17, 41, and 45 at the output of the first round of the DES decryption, assuming that the ciphertext block is composed of all ones and the external key is composed of all ones.Suppose Data Encryption Standard (DES) is used to encrypt the following 64-bit block of plaintext: 6 3 F A C 0 D 0 3 4 D 9 F 7 9 3 Given the initial 64-bit key is: 1 C 5 8 7 F 1 C 1 3 9 2 4 F E F Expand R0 to get E[R0]