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Symmetric Key Definition: Symmetric Key: A cryptographic key used for both encryption and decryption processes in symmetric encryption algorithms, where the same key is shared between parties for secure communication.
Symmetric Key: A symmetric key, also known as a secret key, is a cryptographic key that is used for both encryption and decryption of data. It is a single key that is shared between communicating parties to secure their communication by ensuring confidentiality and integrity of the transmitted data. Symmetric key cryptography is a type of encryption where the same key is used for both the encryption of plaintext and the decryption of ciphertext.