The secret number value used by a symmetric encryption algorithm to control the encryption and decryption process. A key is a number defined by its length in binary digits. Generally, the longer the key length, the more security (i.e. defense against confidentiality breaches) it provides. The length of the key also determines the key space, which is the range of values between the binary digits being all zeros and all ones from which the key can be selected.
Encryption Key
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