[Pkg-gnupg-maint] Bug#514623: Cannot use revoked subkeys for decription using a smart card

Enrico Zini enrico at debian.org
Mon Feb 9 23:04:54 UTC 2009


On Mon, Feb 09, 2009 at 05:17:01PM +0100, Kai Wasserbäch wrote:

> I'd expect GnuPG to behave like this. For me the revocation singals that I've
> lost control over the secret key and therefore any access should be blocked - if
> possible. But that's just my singular opinion and possibly the wrong way to see it.

Try to revoke a key with gnupg, and read the list of reasons for
revocation.  Here's a simple use case for revocation without
compromission: I revoke a 1024b subkey because I've switched to a 4096b
subkey.

But even if the subkey, or the key, has been compromised: sure enough,
it shouldn't be used for signing.  But we are talking about
*decryption*!

Why shouldn't I be allowed to use it to read my own old encrypted data,
maybe (here's another quite legitimate use case) in order to reencrypt
it using the new key?


Ciao,

Enrico

-- 
GPG key: 1024D/797EBFAB 2000-12-05 Enrico Zini <enrico at debian.org>
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