Decrypt the message CFEJFE which was encrypted using the affine cipher: Alphabet: A = 0, B = 1,..., Z=25 Message: f(p) = (15p+5) mod 26

Q: Decrypt the message ORWWPGDII which was encrypted using the affine cipher: f(p) = (11p + 5) mod 26…

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Q: Use the Vigen`ere cipher with key BLUE to encrypt the message SNOWFALL.

A: A =0, B =1, C =2, D = 3, E = 4, F = 5, G = 6, H = 7, I = 8, J =9, K = 10, L = 11, M = 12, N = 13, O…

Q: The message, FMULMZV, is an encrypted message using the affine cipher f (p) = (11p - 6) mod 26. Find…

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Q: 5. Encrypt the message WATCH YOUR STEP by translating the letters into num- bers, applying the given…

A: To encrypt the messege 'WATCH YOUR STEP'' using the encryption function  :

Q: Determine, if possible, the affine cipher C = aP + b (mod 26) that sends plaintext "BI" to…

A: Introduction:  to determine the affine cipher, we need to use the values corresponding to the…

Q: How would you decrypt the Vigen`ere cipher used to encrypt "pineapple"? In general, if your friend…

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Q: In the use of RSA Cryptography, for the public key (11, 65), what is the decrypted original message…

A: Solution :-

Q: Decrypt these messages that were encrypted using the Caesar cipher.a) EOXH MHDQVb) WHVW WRGDBc) HDW…

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Q: Express the Vigen`ere cipher as a cryptosystem.

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Q: Use the Caesar cipher (shift of 3 places) to encrypt BRAVE

A: Since, A=0               O=14B=1               P=15C=2              Q=16D=3              R=17E=4…

Q: a. Find the inverse of 31 modulo 73 b. Decrypt the following message using shift cipher: f(p) = (p+…

A: The inverse of 31 modulo 73 .

Q: Encode the number using the given public key. Encode the number M = 14 using the public key n = 77…

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Q: Encrypt the message AT TEN HEAD NORTH TO TRENCHES using a tabular transposition cipher with rows of…

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Q: Decrypt the message "XMJQYJWNSUQFHJ"  which was encrypted with a Caesar cipher with a shift of 5 (A…

A: To decode code "XMJQYJWNSUQFHJ" using Caesar cipher with a shift of 5.

Q: Decode the number using the given private key. Decode the number M = 15 using the private key d = 53…

A: To decode this using the RSA cryptosystem.

Q: Determine, if possible, the affine cipher C = aP + b (mod 26) that sends plaintext "BI" to…

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Q: Show the working for encode and decode LECTURER using the matrix 26 [13:1- 19 in mod 26. A = 1, B…

A: Algorithm:Start.Define a function matrix_modulo_inverse to calculate the modulo inverse of a…

Q: 13. Suppose a message is encrypted using the RSA system with n = 53*61 and e = 19. Suppose the…

A: It is given that, a message is encrypted using the RSA system with n = 53*61 and e = 19.  Suppose…

Q: Decrypt the following ciphertext: 17 and 14. The p = 5 and q = 11.  No ai, show how you solved it

A: Step 1: Step 2: Step 3: Step 4:

Q: An encryption function is given as f(p) = (p + y_value) mod 26 where p is the position of the input…

A: As the y_value is not mentioned, I assume it to be a prime number 7 say. The  the position of the…