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I have received a rather peculiar cipher and in all my years of crypto, I have never seen a cipher like this. The cipher is Numeric, Uppercase mixed with Lowercase. The only hint I'm given is "Capital Letters Mean Something". If this isn't enough info, I'm sorry. The person I received the challenge from hasn't given me any other information.

Ciphertext as follows: SQr1, IsNp, Nz2SY, rstuy? Io hns LyXL?

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    $\begingroup$ Kinda doesn't help how short the text is. $\endgroup$
    – Neo1009
    Commented Oct 2, 2019 at 23:51
  • $\begingroup$ Yeah, that definitely won't help. $\endgroup$
    – Brandon_J
    Commented Oct 4, 2019 at 22:40
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    $\begingroup$ One thought though, is an Alberti Cipher. It uses capital letters and numbers to change between two alphabets. $\endgroup$
    – Neo1009
    Commented Oct 4, 2019 at 22:48

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