The block cipher attack strategy that attempts to retrieve the key by performing decryption and encryption simultaneously on a understood plaintext-ciphertext pair exists plaintext attack.
<h3>What is plaintext attack?</h3>
The known-plaintext attack is a type of cryptanalysis attack in which the attacker has access to both the encrypted and plaintext versions of the target data. These can be used to reveal additional hidden information, including code books and secret keys. An attack using known plaintext occurs when the attacker has access to pairs of known plaintexts and the ciphertexts that go with them.
The objective is to figure out the secret key (or keys) or to create an algorithm that would enable him to decrypt any additional messages. Ordinary readable text before it is converted into ciphertext in cryptography is known as plaintext, as is readable text that has been recovered from encryption. Not all data inputted into or outputted by encryption methods is plaintext.
Hence, The block cipher attack strategy that attempts to retrieve the key by performing decryption and encryption simultaneously on a understood plaintext-ciphertext pair exists plaintext attack.
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