8. Base 16 Encoding

Base16 is hexadecimal encoding. Each 4-bit group maps to one character, so one octet becomes two output characters.

RFC 4648 uses the uppercase alphabet 0-9 and A-F. Base16 does not use padding because each octet is exactly represented by two hexadecimal characters.

Value Encoding
    0 0
    1 1
    2 2
    3 3
    4 4
    5 5
    6 6
    7 7
    8 8
    9 9
   10 A
   11 B
   12 C
   13 D
   14 E
   15 F