Base64
https://en.wikipedia.org/wiki/Base64
Char Set
- 64 base:
a-z,A-Z,+,/ - padding:
=
Encoding
Base64 encoding would turn each 3 Bytes group ($38=24$) to 4 Bytes ($46=24$), where 6 bits = 2**6 = 64.
Example
https://en.wikipedia.org/wiki/Base64
a-z, A-Z, +, /=Base64 encoding would turn each 3 Bytes group ($38=24$) to 4 Bytes ($46=24$), where 6 bits = 2**6 = 64.