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Remember that in the One Time Pad (OTP) cryptosystem, the key is as long as the plaintext. A fresh random key needs to be generated
Remember that in the One Time Pad (OTP) cryptosystem, the key is as long as the plaintext. A fresh random key needs to be generated each time you want to encrypt a new plaintext. Explain why one should never reuse a key in OTP? Hint: Consider the case where you encrypt plaintext P and plaintext P2 (of same bit size) with the same key K, to obtain ciphertexts C1 and C2. What could an adversary learn about P1 and P2 from C1 and C2? In this attack, the adversary has access only to ciphertexts Ci and C2, but not to the key or the plaintexts Remember that in the One Time Pad (OTP) cryptosystem, the key is as long as the plaintext. A fresh random key needs to be generated each time you want to encrypt a new plaintext. Explain why one should never reuse a key in OTP? Hint: Consider the case where you encrypt plaintext P and plaintext P2 (of same bit size) with the same key K, to obtain ciphertexts C1 and C2. What could an adversary learn about P1 and P2 from C1 and C2? In this attack, the adversary has access only to ciphertexts Ci and C2, but not to the key or the plaintexts
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