this post was submitted on 06 Sep 2025
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[–] Zak@lemmy.world 5 points 2 weeks ago (1 children)

It need only check at install time.

[–] LodeMike@lemmy.today 4 points 2 weeks ago (2 children)

Correction: SSL certificates can expire before someone would want to continue being able to install any given app.

[–] Zak@lemmy.world 5 points 2 weeks ago (1 children)

Sure, the developer needs to keep the certificate up to date and re-sign the APK on occasion.

[–] LodeMike@lemmy.today 3 points 2 weeks ago (2 children)

So any APK I download will just expire at some point in time that's probably really annoying to know, and then I have to dig through the internet again so I can install the app again?

[–] Zak@lemmy.world 1 points 2 weeks ago (1 children)

Another option is to allow otherwise-valid signatures after expiration. It's generally still possible to check them.

[–] LodeMike@lemmy.today 1 points 2 weeks ago (1 children)

That completely nullifies the entire point of signature validations.

[–] Zak@lemmy.world 1 points 2 weeks ago (1 children)

How? Expiration doesn't grant an unauthorized party access to the private key.

[–] LodeMike@lemmy.today 1 points 2 weeks ago (1 children)

There's zero cryptographic reason to have a signed date at that point.

[–] Zak@lemmy.world 1 points 2 weeks ago

Which nullifies the point of certificates having an expiration date (limited window for exploiting a compromised certificate, possibility of domains changing hands), not the point of validating the signature (tie responsibility for apps to who owned a domain on a specific date, allow third parties to create blacklists of bad developers).

[–] pycorax@sh.itjust.works 1 points 2 weeks ago

If it's anything like how Windows does it, you would still be able to override it. It just gives you a scary warning and hides the option unless you click "more info" or something.

[–] LodeMike@lemmy.today 1 points 2 weeks ago

These two are identical for software.