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Related phrases: symmetric encryption key

Definitions of symmetric encryption:

Encryption uses a key to encode data. In symmetric encryption the same key is used to encode and decode data. The problem with this system is that if you wish others to use the system, you must transmit the correct key to them. This risks disclosure of the key. Symmetric encryption is often used to encrypt information that remain on the same computer system. For communications uses public key encryption is simpler and more secure to use. ...
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A method involving a single secret key for both encryption and decryption.
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The oldest form of key-based cryptography is called secret-key or symmetric encryption. In this scheme, both the sender and recipient possess the same key, which means that both parties can encrypt and decrypt data with the key.
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This fast-performing algorithm is typically used for bulk (large volume of data ) encryption. The same key is applied to the encryption and decryption process. As the name suggest, the key is kept secret between sender and receiver. Widely used examples are DES, Triple DES and RC4. Top
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Symmetric-key algorithms are a class of algorithms for cryptography that use trivially related cryptographic keys for both decryption and encryption.
en.wikipedia.org/wiki/Symmetric_encryption