Symmetric key in cryptography

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In symmetric key cryptography the same key is used to encrypt and decrypt the message. What is that key?
Jun 20 in Blockchain by Gani
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1 answer to this question.

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Yes, the same key is used to encrypt and decrypt the message. A key is a piece of information (a parameter) that determines the functional output of a cryptographic algorithm. For encryption algorithms, a key specifies the transformation of plaintext into ciphertext
and vice versa for decryption algorithms.
answered Jun 20 by Firoz

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