Abstract:
Symmetric Encryption Algorithms - The key used to encrypt messages is derived from the decryption key, and vice versa, such cryptographic algorithms are called symmetric. Most symmetric algorithms use a single key. Such algorithms are called single-key or secret-key algorithms and require the sender and receiver of the message to agree on which key to use. The reliability of single-key algorithms is determined by key selection. If the perpetrator knows the key, it will be possible to decrypt all seized data without any resistance. This means that the selected key must be kept secret from strangers.
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