I recently came across the hmacsha1 tag, and was originally going to suggest that it be renamed to hmac-sha1 (since running the two acronyms together like that just looks silly). However, after thinking about it a bit more, I wonder if we really need that tag at all. Basically, all it amounts to is the intersection of the existing hmac and sha1 tags.
Before I start manually retagging 84 questions, though, I'd like to ask if anyone has any better suggestions. In particular: