Question

英语翻译如果是基于以上两点,那么我们使用最简单的恺撒法即可,为什么Base64看起来要比恺撒法复杂呢?这是因为在Emai

Answer 1

If it is based on the above two points, then we use the simplest method to Caesar,Why Base64 method looks complicated than it? This is because the Email transmission process, due to historical reasons, Email is only allowed to send ASCII characters, that is an 8-bit byte is 7 bits. So, if you send an email with non-ASCII characters (ie the highest bit is 1 byte) of the Email through a "historical problem " may occur when the gateway issue. Gateway will be the highest position 0 is clear, that cause the problem! Therefore, in order to send a normal Email, this issue must be considered! So, just by changing the location of the letters of programs like Caesar will not succeed.