One Verisign code signing certificate costs $ 500 a year (a little less if you buy a multi-year lease) and doesn't limit the number of signatures that you perform during this time. Of course, you can get cheaper code signing certificates with unlimited use within a given time from other companies, for example. I see the instantssl "Comodo" gives you a 3-year rental for the same $ 500, and thawte is $ 300 for the first year and a little less for updating - however, I have no personal experience with them, and I'm not sure how many of these hundred-dollar differences have value for you, so itβs hard to give specific advice, besides the fact that a certificate with unlimited use seems to be the standard approach (indeed, I donβt even know where to go for a fee for use!)
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