

yes but as you yourself said
I think they want to, but Microsoft has made it expensive for open source developers who do this as a hobby and not as a job to sign their software. I know not too long ago, this particular dev was asking its users to install a root certificate on their PC so that they wouldn’t have to deal with Microsofts method of signing software, but that kind of backfired on them.
the part that we’re arguing against isn’t that a microsoft signing key would have fixed the problem, it’s
No, because you wouldn’t be able to execute the updated exe without a valid signature. You would essentially brick the install with that method, and probably upset Microsoft’s security software in the process.
this update mechanism already exists: it’s the reason the hijack was possible. whatever the technical process behind the scenes is irrelevant… that is how it currently works; it’s not a “what if”
adding signing into that existing process without any 3rd party involvement is both free, and very very easy
which is why this is a solved (for free) problem on linux






clearly that’s not the case if this was exploitable… again, N++ has an auto update mechanism that they current use. if they used a microsoft signing key to sign a builds hash, this hijack would not be possible
thus they have an update mechanism that works around microsoft signing… how is irrelevant. that is the current state of the software
that part we definitely agree on
side note: doesn’t remotely solve the problem… software updates should be immune to this to start with. it’s a problem that the hosting provider was compromised, but honestly we’re talking about a state sponsored hack targeting other states: almost no hosting provider would include this in their risk assessment, let alone shared hosting providers
again, that’s irrelevant… the concept that we’re talking about isn’t even specific to GPG. signing a hash using a private key is basic crypto, and GPG is a specific out of the box implementation
if we remove microsoft signing as an option for whatever reason (which we have) then it’s still very possible, and very easy to implement signed updates into your own custom update mechanism