Base64 Encryption and decryption algorithm

Base64 algorithm

1) Solve the problem:

Network transport channels do not support all bytes of transmission

2) Definition:

Base64 is a representation of binary data based on 64 printable characters

3) Elements:

a-za-z0-9+/a total of 64 characters, which is also the origin of the base64 name

4) Space Utilization:

The base64 character is 8 bits, but only 6 bits are useful, and the two bits on the left are always 0

5) Method:

8 and 6 of the least common multiple is 24, the algorithm will be 3 characters 3 characters of the solution of a string, each 3 characters with the corresponding four characters (base64 64 elements), the last insufficient bit default is 0, if 6 bits are all 0, then =, so = can only appear at the end.

6) The decoding of the EG:A,BC is as follows:

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Base64 Encryption and decryption algorithm