Blot out fact in Radix-64

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How to blot out fact in Radix-64

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hello world welcome back to another imaginary CTF 2024 writeup video in this video weamp;#39;ll be walking through the crypto challenge base 64 letamp;#39;s get into it yet another B 64 decoding challenge okay so I have the files that give you downloaded over here letamp;#39;s go ahead and open this in code okay you have a main.py source code and an out.txt file with the secret key scanning through this main.py script we see that we have a Q being assigned the value 64 and then itamp;#39;s opening the flag file and then converting the flag to a long integer then itamp;#39;s initializing the secret key list and then itamp;#39;s looping through our flag integer and then itamp;#39;s appending to the secret key the flag integer mod Q so the remainder of the flag integer divided by q and then it floor divides the flag integer by q and then it assigns the flag integer to the quotient of that operation so itamp;#39;s clear that we need to reverse this so what Iamp;#39;m going

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What is Base64 for dummies?

In computer programming, Base64 is a group of binary-to-text encoding schemes that transforms binary data into a sequence of printable characters, limited to a set of 64 unique characters.

What is the radix 64 encoding?

What is Radix 64 Encoding? Radix 64 encoding allows binary data stored in octets (i.e. bytes) to be expressed as printable characters.

What is the optimal radix for radix sort?

A smaller radix means more passes, but less space and time for each pass. Therefore, the optimal radix depends on the size and distribution of the array, as well as the available memory and cache. A common heuristic is to choose a radix that is close to the square root of the array size.

Is Base64 the same as UTF-8?

No, Base64 and UTF-8 serve different purposes in data encoding. Base64: It is a binary-to-text encoding scheme that represents binary data in an ASCII string format by converting it into a radix-64 representation.

What is the Base64 encoding?

Base64 is a binary to a text encoding scheme that represents binary data in an American Standard Code for Information Interchange (ASCII) string format. Its designed to carry data stored in binary format across the channels, and it takes any form of data and transforms it into a long string of plain text.

What is the Base64 number encode?

Base64 encoding is a popular method used to encode binary data, particularly when this data needs to be stored or transferred over media designed to manage text. Its primary function is to ensure that the encoded data remains intact, without modification during transport.

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