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Base64 encoding wikipedia8/28/2023 ![]() Write down the last four binary bits for that letter on the left.Write down 0 + the first three binary bits on the top.Here's a rundown of how you would read the card: So, the 8th bit will always be zero when writing down the full binary word. I need to stress that you need to write down the FULL 8 BITS, even though the card linked to only gives you 7. It's going to take you some time to write down every character in 8-bit binary. STEP TWO: Convert your ASCII string to numerical binary ![]() I like the linked chart above, because it gives it to me out the gate, which is one less conversion to worry about. So long as you can convert it to binary, that's all that matters. Really, you can use any standard ASCII chart that provides you with the decimal, octal or hexadecimal values of the character. The chart linked to gives you the table on how to do it. Reason being, is you need to covert the ASCII text to numerical binary. I would recommend memorizing or printing out (and stuffing in your wallet) this chart here. It could be an interesting skill to add to my own hand cipher, and could even prove to be useful around the house. While I know base-64 is not considered a cipher algorithm, I thought to myself that I don't know how to convert a string of ASCII text to base-64 by hand. ![]() While I don't do anything with hand ciphers practically, I still consider it a fun skill to have, whether or not it actually proves to be useful (when I was a Boy Scout, I always wanted to learn Morse Code, so I could tap out answers to a quiz or test in class to a fiend, and back to me without anyone knowing. I've even invented my own hand cipher, even though I doubt it would show any form of cryptanalytic strength. Since then, I've been fascinated by hand cipher techniques, and I've learned a few historical ones over the years. I even learned the ancient runes, and used those quite a bit too. ![]() It was great for passing notes in class when I was in elementary and secondary education. I learned and used, as most kids to, the Caesar cipher first (using my trusty Captain Crunch Decoder Ring), then later learned and used the Affine cipher. When I was a kid, I had this fascination with cryptography. ![]()
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