I have a GPG key which has an ElGamal subkey (elg2048). Frankly, I don't remember why that is or whether I actually need it - I just have it. Now, I've just changed the expiry date of the key overall, using
gpg2 --edit-key; however, the subkey expiration date seems not to have changed.
- Can I change that subkey's expiration date?
- If so, how?
- If not - should I care? Should I just remove it?