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2. Using the English alphabet (i.e., mod 26 arithmetic) let plaintext = {p1, p2,... , pn} and corresponding ciphertext = {c1, c2,... , cn}. Suppose the encryption function is ci = pi + 15 (mod 26). If you receive the ciphertext message YPHDCRPBEQTAA, decrypt to recover the plaintext. What is the decryption function, and the recovered plaintext? What type of cipher is this?
The Internet evolution is and is very fast and the Internet exposes the connected computers to attacks and the subsequent losses are in rise.
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Logic bombs, War dialing, Ping of death attack, steganography, RSA scheme, digital signature, A chain of certificates, A certificate revocation list, A trust anchor, asymmetric algorithm used by PGP, IPSec mode, IP virtual Private Networks
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