Hexadecimal bytes Hexadecimal is a system of numerical notation in the base 16. It actually does not use binary numbers directly but serve as an intermediate between it and decimal number system. Every hex digit can contain 4 bits in binary, which has a name- it is called a nibble. Therefore, the representation of four hexadecimal digits for a number itself can be considered as how many bytes it takes:
Hex Basics: 4 bits per hex character; Two hexadecimal characters are needed to represent one byte because a byte contains 8 bits. Thus 4 hexadecimals digits references two bytes.
Here is an example of a conversion: converting the hexadecimal number 1A2B to binary.—
1A = 00011010
2B = 00101011
This produces the binary number 0001101000101011 which is equivalent to length of our resulting key and one byte.
Usage: The implementation of this conversion is critical in computing and digital systems as data are usually represented by hexadecimal for the sake of efficiency and readibility.hexadecimal (ad) Hexadecimal each pair of hexadecimal digit correspond to one byte in binary data, long string 0 and 1 representation it easier use by programmers and engineers.
So, as a resume, we have : 4 hexadecimal digits for two bytes to simple mapp binary information in technical areas.