This is a huge advantage over symmetric key cryptography in that there is no need for the sender of a message to exchange a secret key with the intended receiver 這比起對稱密鑰加密來有一個很大的優(yōu)點,那就是消息的發(fā)送方不需要與相應(yīng)的接收方交換需保密的密鑰。
In symmetric key cryptography , the plaintext is encrypted by submitting a fixed text , the " key , " and the plaintext to the encryption algorithm , which then returns the ciphertext 在對稱密鑰加密中,明文的加密過程是這樣的:將一個固定的文本,即“密鑰”和明文一起提交給加密算法,然后加密算法返回密文。
The same key is used for both encryption and decryption , hence " symmetric key cryptography . " symmetric key cryptography is sometimes called secret key cryptography , as the security of the ciphertext depends upon the key being kept secret 由于加密和解密都使用相同的密鑰,因此這種算法被稱作“對稱密鑰加密” 。對稱密鑰加密有時也被稱為秘密密鑰加密,因為密文的安全取決于密鑰能否被保密。