Berend Tober wrote:


Indeed, and I even included in my original post "(Aside from the obvious -- "Stop using MS-Excel!" -- because that is a failure I cannot control...)". Kids these days....

Anyway, I've looked at WinPT and GPGee and one other GUI wrapper around gnupg, but they all of course are victims of this MS Excel "feature", and furthermore none of them satisfy my other need to be able to support multiple persons signing any given document, either (cf. other mailing list message thread "Multiple signatures on a single file").



Just my two cents worth: isn't it true that most Windows zippers can open a file "from inside a zip archive", i.e. uncompress it transparently to a temp directory and open from there? One easy-to- use solution could therefore be to store the Excel file inside a zip archive, and then sign that archive? When the second person opens the spreadsheet, all the changes Excel wants to do are done to the temporary copy -- not the actual spreadsheet itself.

Kusti



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