What is a cryptographic cipher?
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techtarget.com
What is a cryptographic cipher?
A cipher is an algorithm for encrypting and decrypting data. Find out the steps for using a cipher to convert plaintext into ciphertext -- and back.
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One may argue that if the plaintext does not repeat, using the same IV is safe. Let us look at the OutputFeedback (OFB) mode. Assume that the attacker gets hold of a plaintext (P1) and a ciphertext (C1),can he/she decrypt other encrypted messages if the IV is always the same? You are given the followinginformation, please try to figure out the actual content of P2 based on C2, P1, and C1.Plaintext (P1): This is a known message!Ciphertext (C1): a469b1c502c1cab96696550425438e1bb1b5f9037a4c159Plain
One may argue that if the plaintext does not repeat, using the same IV is safe. Let us look at the OutputFeedback (OFB) mode. Assume that the attacker gets hold of a plaintext (P1) and a ciphertext (C1),can he/she decrypt other encrypted messages if the IV is always the same? You are given the followinginformation, please try to figure out the actual content of P2 based on C2, P1, and C1.Plaintext (P1): This is a known message!Ciphertext (C1): a469b1c502c1cab96696550425438e1bb1b5f9037a4c159Plain
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One may argue that if the plaintext does not repeat, using the same IV is safe. Let us look at the OutputFeedback (OFB) mode. Assume that the attacker gets hold of a plaintext (P1) and a ciphertext (C1),can he/she decrypt other encrypted messages if the IV is always the same? You are given the followinginformation, please try to figure out the actual content of P2 based on C2, P1, and C1.Plaintext (P1): This is a known message!Ciphertext (C1): a469b1c502c1cab96696550425438e1bb1b5f9037a4c159Plain
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