Rub out answer in Radix-64

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Aug 6th, 2022
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How to rub out answer in Radix-64

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i always thought computers were better at math and people until i tried to add 0.1 to 0.2 and got an answer of 0.3000000004 what the hell javascript is just a toy language so i figured it was a bug and tried the same thing in python but it also gave me the same wrong answer then i discovered that these languages arenamp;#39;t actually broken they just do floating point arithmetic computers have a limited amount of memory and need to make a trade-off between range and precision in javascript all numbers must be stored within 64 bits that means we can have integers accurate up to 15 digits and a max of 17 numbers after the decimal point itamp;#39;s called a floating point because there are no fixed number of digits before or after the decimal point allowing it to represent a wide range of numbers both big and small the problem is that computers use a base 2 system binary while humans use a base 10 system that leads to rounding errors when all the memory has been used up and thatamp;#3

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Since Base64 uses 24-bit sequences, padding is needed when the original binary cannot be divided into a 24-bit sequence. You have probably seen this type of padding before represented by printed equal signs (=). Base64 encoding: What sysadmins need to know - Red Hat Red Hat sysadmin base64-encoding Red Hat sysadmin base64-encoding
What is Radix 64 Encoding? Radix 64 encoding allows binary data stored in octets (i.e. bytes) to be expressed as printable characters. Radix-64 characters require the binary input to be split into blocks of 6. These numbers (which all range from 0 - 63) are then mapped onto a character set of printable characters. Simple Radix 64 Encoding in C - GitHub GitHub csknk radix-64-encoding GitHub csknk radix-64-encoding
Base64 strings tend to end in one or two equal signs, but not always! These strings are not exact representations of the binary data in ASCII, because padding is applied to ensure the string length is a multiple of 4 characters. Each equal sign represents two bits of zero-padding.
A Base64 string will end with == if and only if the number of bytes it encodes, mod 3, equals 1. Do you see the pattern? It happens that 16-byte (128-bit) encryption keys are very commonly encoded in Base64, and since 16 mod 3 = 1, their encoding will end with == . But your string, decoded, is 61 bytes (488 bits) long.
The = sign is used to indicate padding if the input string length is not a multiple of 3 bytes. If we have four bytes for the input, then the base64 encoding ends with two equal signs, just to indicate that it had to add two characters of padding. Understanding Base64 encoding - Medium Medium Medium
When decoding Base64 text, four characters are typically converted back to three bytes. The only exceptions are when padding characters exist. A single = indicates that the four characters will decode to only two bytes, while == indicates that the four characters will decode to only a single byte.
The = sign is used to indicate padding if the input string length is not a multiple of 3 bytes. If we have four bytes for the input, then the base64 encoding ends with two equal signs, just to indicate that it had to add two characters of padding.
On some keyboards, one can enter a null character by holding down Ctrl and pressing @ (on US layouts just Ctrl + 2 will often work, there being no need for ⇧ Shift to get the @ sign). The Hexadecimal notation for null is 00 . Decoding the Base64 string AA== also yields the null character. Null character - Wikipedia Wikipedia wiki Nullcharacter Wikipedia wiki Nullcharacter

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