I wonder if Chatgpt can decrypt all of them just by analyzing vowel frequency, and then trying to find the algo on the internet.
I wonder if Chatgpt can decrypt all of them just by analyzing vowel frequency, and then trying to find the algo on the internet.
In my tests, ChatGPT 5 Thinking can handle a monoalphabetic substitution cipher if you prompt it a couple times to keep going.
Not perfectly. I grabbed a random encoded line from these comments, and asked ChatGPT to decode it[1]. It determined the plaintext was:
> Immediately thought of Moby, infact a quick search for this title... coincidental, but I would mention it in the page if I were you.
and noted that it had "preserved punctuation and capitalization from the ciphertext". The actual plaintext should be:
> Immediately thought of XKCD, infact a quick search for this title gives me XKCD, it could be coincidental, but I would mention it in the page if I were you.
I've hit my free usage limit so can't currently prompt it further about its mistake.
[1] https://chatgpt.com/share/68cf17a6-8478-8011-a44e-64d43ad8a4...
I pushed it a bit and it didn’t do so hot.
https://chatgpt.com/share/68cf3b9f-decc-8007-8a5d-cc7b583d0e...