symmetric encryption system
Symmetric Encryption. The message is confidential, so Alice uses a key to encrypt the message. The original message is called a plaintext while the encrypted message is called a ciphertext. The ciphertext is sent to Bob, who knows the key and uses the same symmetric cipher (e.g., AES or 3DES). Thus Bob is able to decrypt the message.
Definition of Symmetric Encryption. The sender of the message or information will use the key for encrypting the message, and the receiver will use the key for decrypting the message. The commonly used symmetric encryption algorithms are DES, 3 DES, AES, RC4.
Symmetric encryption is a form of encryption where the same key is used to encrypt and decrypt the message. Symmetric encryption is a kind of computerized cryptography using a particular encryption key to conceal an electronic message. Its data conversion utilises a mathematical procedure along with a …
Related Terms. An encryption system in which the sender and receiver of a message share a single, common key that is used to encrypt and decrypt the message. Contrast this with public-key cryptology, which utilizes two keys – a public key to encrypt messages and a private key to decrypt them. Symmetric-key systems are simpler and faster,
A symmetric encryption algorithm is one where the same key does both encryption and decryption. Because of its symmetry, it is of utmost importance that the key must be kept secret. An example is the ROTn algorithm, where, given an alphabet of m letters and n < m, you take the cleartext in this alphabet and rotate each letter by n.
To decrypt data that was encrypted using one of the SymmetricAlgorithm classes, you must set the Key property and the IV property to the same values that were used for encryption. For a symmetric algorithm to be useful, the secret key must be known only to the sender and the receiver.
The Advanced Encryption Standard, AES, is a symmetric encryption algorithm and one of the most secure. The United States Government use it to protect classified information, and many software and hardware products use it as well. This method uses a block cipher, which encrypts data …
This symmetric key is then used to encrypt the rest of the potentially long message sequence. The symmetric encryption/decryption is based on simpler algorithms and is much faster. In a public key signature system, a person can combine a message with a private key to create a short digital signature on the message.