Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Affine cipher is less secure than caesar cipher.
1. true 2. false
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- Q# Combining transposition cipher with substitution cipher improves its strength? T or Farrow_forwardEncrypt the message "do not attack" using the affine cipher with key = (17,14). Ignore the space between the words. Decrypt the message to get the original plaintextarrow_forwardHow can an incremental method improve things?arrow_forward
- Affine cipher is not susceptible to frequency analysis. 1. true 2. falsearrow_forwardA block cipher with a random key is most like a Choose one: Private random function Public random permutation Private random permutation Public random functionarrow_forward8. Also, in the Caesar cipher you could not encrypt two different letters to be the same letter (meaning if “p" → "S" then nothing else can go to “S"). Is this true of the Vigen'ere cipher too?arrow_forward
- Perform the Encryption and then the Decryption for the Hill Cipher where the Plain text: "POH" and the key is: "GYBNQKURP".arrow_forwardLet k be the encipherment key for a Caesar cipher. The decipherment key is 26 – k.One of the characteristics of a public key cryptosystem is that the encipherment anddecipherment keys are different. Explain why the Caesar cipher is a secret keycryptosystem, not a public key cryptosystem?arrow_forwardQuestion # 3 Assume that Dominique and Pricilla agreed to use an auto key cipher with initial keyvalue k1 = 11. Now Dominique wants to send Pricilla the following message“THE CLASS IS CANCELLED”. Encrypt the message before transmitting it over the Internet Remember: i need a Mathematics solution not computer program You must show all the steps of your workarrow_forward
- Affine cipher is an example of? 1. Mono alphabetic cipher 2. Poly alphabetic cipher 3. Transposition cipher 4. Asymmetric cipherarrow_forwardCorrect answer will be Upvoted else downvoted. Thank you! Monoalphabetic ciphers are stronger than Polyalphabetic ciphers because frequency analysis is tougher on the former. i) True ii) Falsearrow_forwardLet E'(T,X) be a tweakable block cipher that has already been keyed. Given plaintext P = P1 || P2 || ... || Pn (ie, P is an n-block plaintext). Ci = E'(i, Pi) for i=1..nsum = P1 xor P2 xor ... xor Pntag = E'(0,sum) For simplicity let's say that E'(T,X) = ROTL(X,T+1) (ie, X rotated left T+1 bits. If the block cipher block size is 8 bits and you are encrypting the two byte plaintext 67 89, what ciphertext and tag would be created? Fill in each box as a two-digit hex value. C1____? C2____? tag____?arrow_forward
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