Encrypt and decrypt the plaintext

0031. Compute Euler’s totient function for the value 1729.

11. Find 425 mod.

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12. Solve the value of 413334 mod.

13. Solve the value of 426662 mod.

1. Encrypt and decrypt the plaintext networks using the Caesar cipher method for the key

value K = 7.

2. Perform cryptanalysis over the given cipher text ‘LFDPHLVDZFRQTXHUHG’.

3. Encrypt and decrypt the plaintext computer using Affine cipher method for a = 5 and b = 13.

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