No one likes duplicate questions, but I'm considering posting a question about information theory. It would be well-suited to both Cross Validated AND Cryptography. I'd be interested in the opinions of both communities. Can a single question be shared across two (or more) Stack Exchange sites? If so, how? If not, why not?
The term you are looking for is "cross-posting". It is a little bit ambiguous, but the general consensus is that it is inappropriate. This topic has been discussed before on meta.CV; see these threads:
- Is the help 'misinformed' on the question of cross-posting?,
- Cross-posting in CV and math.SE tends to become an epidemic, and
- Posting the same question on other statistics forums in addition to CV.
Your situation may be different, though. The typical problem is that someone asks an identical statistics question here and on math.SE (which has a
[statistics] tag and small set of dedicated followers), or an R / statistics question here and on SO. Your description is too vague for me to know for sure, but I wonder if the statistical and cryptographical aspects are different aspects of the question. If you want a statistical perspective on something, and a cryptographical perspective on it as well, that strikes me as acceptable. You aren't just fishing for a faster answer, or trying to find someone who'll do your homework for you, and the answers wouldn't provide duplicate information across the SE system.