Base64 is one of the most common encoding methods used on the network to transmit 8Bit bytecode. Base64 is a method of representing binary data based on 64 printable characters. You can refer to RFC2045 to RFC2049, which provide detailed specifications for MIME. Base64 encoding is the process of converting binary to character and can be used to transmit longer identification information in HTTP environments. Using Base64 encoding has unreadability and requires decoding before it can be read. Base64 is widely used in various fields of computers due to its advantages. However, because the output content includes two or more "symbol class" characters (+,/,=), various "variants" of Base64 have been developed for different application scenarios. To unify and standardize the output of Base64, Base62x is considered an improved version of unsigned encoding