A method of encryption in which a single key is used to scramble and unscramble data. One weakness of symmetric cryptography is that the user has to distribute the key to the recipient without letting it fall into the wrong hands. The user can do this by encrypting the key itself, but then another key will be needed to decrypt the first one. See also asymmetric cryptography.

A branch of cryptography involving algorithms that use the same key for two different steps of the algorithm. Symmetric Cryptography is also called "secret-key crytography".

Cryptography that makes use of shared secrets as opposed to public keys.

symmetrical cryptography or cryptography with the closed gate. The cryptographic algorithm, in which for the coding and the decoding is used one and the same key.

A method of encryption and decryption using a key which all involved parties possess. This means that prior to any communication being encrypted a key must be shared between the two communicating parties.

The study and application of Ciphers that use a single secret key for both encryption and decryption operations. See: SSL/TLS Encryption

The study and application of cipher s that use a single key for both encryption and decryption operations.

A symmetric cipher is one in which the same key is used for encryption and decryption. Therefore a secure method has to be found by which the sender and recipient can agree on the key. IDEA, RC4 are symmetric ciphers.

Symmetric Cryptography is a type of cryptography characterized by the fact that the same key that is used to encrypt the plaintext is also used to decrypt the ciphertext.