This is a basic challenge in the Cryptography category. The challenge tells us:
I asked my friend what type of candy they want to get to hand out tomorrow night, but they refuse to answer without using this weird cipher! Everytime I ask they respond with
TWV0YUNURntsMzdzX2cwX3cxdGhfZDRya19jaDBjMGw0dDN9
In reality, this isn’t a cipher at all, it’s a common method of text encoding (an encoding, unlike a cipher, does not rely on any sort of changing key, and offers no security) known as Base64. This is hinted to by the title (“64 Types of Candy”), and is common enough that many people recognize it on sight.
You can also load the text into a tool like CyberChef. When you place it in the Input panel, it detects that de-base64-ing it will produce readable text, so a “Magic Wand” icon automatically appears:
Pressing this will insert a From Base64 block into the recipe, which will decode the input text and yield the flag.
