Symmetric-key Cryptography
Symmetric-key cryptography is a type of encryption where the same secret key is used for both encryption and decryption of the data. In this method, the sender and receiver both use the same key to encrypt and decrypt the message. The security of the system depends on the secrecy of the key. Symmetric-key cryptography is faster and more efficient than asymmetric-key cryptography, but it requires a secure method of exchanging the secret key between the sender and receiver. This method is commonly used in data encryption, secure communication, and digital signatures.
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