Abstract
- It is called Base 64 because it encodes binary data into 64 unique characters which can be represented with 6 Bit
- 26 uppercase English alphabet
- 26 lowercase English alphabet
- 10 digits, 0 to 9
- 2 additional characters,
+&/
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Encode 3 Byte with 4 base64 characters as one unit
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=at the end of the base64 encoded string denotes the total number of empty bytes.=means there is 1 empty byte at the end,==means there are 2 empty bytes at the end
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It ensures each encoded binary sequence don’t go over 6 bits
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This is useful because some old devices only transmit data in 7bits
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Imagine you have a machine that needs to transmit data in 8bits, it needs such old device to transmit the data to another machine
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Without base64, the another machine will treat the received 7bits as 8bits aka adding a random bit somewhere that messes up the data the original machines wants to send
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Thus, base64 ensures data that is transferred from one machine to another isn’t corrupted
Reference
- What is Base64?