Data encryption (meaning: Cryptography)
.Meaning the encryption is used, algorithm, complex in transforming the original data (plaintext) with encryption, change data through encryption and. Ciphertext) algorithm used to encrypt and decryptThe purpose of the encryption and decryption:
.The purpose of the encryption and decryption The main purpose of encryption and decryption is unauthorized users will not be able to access the information, or to access the data difficult.Unauthorized users may access data, but cannot understand the meaning of that information that
.
, the type of encryptionThe type of encryption, encrypted and decrypted data transmission system and in the independent work, there is a 2 symmetric encryption. Symmetric key algorithms) encryption asymmetric (Asymmetric key algorithms) classification based on key key.With the algorithm to encrypt and decrypt the key here in comparison with a key. Must have the key only to open the lock read data
.
encryption symmetric (Symmetric key algorithms):
.Symmetric encryption (Symmetric key algorithms) symmetric encryption, using secret key in contact between the 2 people the same in both. Encrypt and decrypt before sending the data being encoded. Then through the system independent work. Well, 2Must have the key and the algorithm that agreed to use to encrypt and decrypt
.The problem of symmetric encryption
!The problem of symmetric encryption. The problem in using the secret key is to send the key, keep a group one, and intercepted smuggled the key by malefactors. If you do, and you B used to send data by using a secret key, and Mr. c traps.Will you c. Can read the confidential data sent between you, and you, B, not just that. You. Maybe can create data, deceived. You, are you B. If contact with several groups to use the key of
.
.
การแปล กรุณารอสักครู่..
