2016年8月,我国发射了一颗“墨子号”卫星,引来众多关注。这是一颗什么卫星呢?失灵的老密码特殊的通信需要保密,保密则需要密码钥匙。传统的密码钥匙就是信息的加密方式,因为它和咱们开门用的钥匙有相似功能,所以被称为密码钥匙。打个比方:甲想向乙传输1-2-3这段信息,先按照将每个数字都加3的方式向乙传输4-5-6,1-2-3就叫明文,4-5-6就叫密文,而每个数字 In August 2016, China launched a “Mozi” satellite, attracting a lot of attention. What is a satellite? A malfunctioning old password A special communication requires confidentiality, while a confidential password requires a secret key. The traditional cryptographic key is the way of encrypting information because it has a similar function to the key we used to open the door, so it is called the cryptographic key. For example: A want to send 1-2-3 this section of information, according to each figure plus 3 to the B transmission 4-5-6, 1-2-3 is called the plaintext, 4-5 -6 is called ciphertext, and every number