On Thu, Jun 16, 2016 at 12:17 PM, <yurip...@sohu.com> wrote: > > Problem 1. > When I run "gpg --gen-key", everything done well, except the last step, > type on the keyboard to gain enough entropy for the random number > generator, the process seemingly will never end. > Ref. to the attatchment, pls. download and check. > > I want to know what cause it and how to solve? >
This is a well known issue. If you install haveged: `apt-get install haveged` it will improve greatly the time of key generation. What is entropy and why it is slow? This is beyond my understanding. > So I generate one key on PC running Ubuntu, export the key, and then > import the key into the target board. > Now I can signature files with the key, but when I verify the signature > successfully, one Warning emerged as below > > Problem 2. > > gpg: Signature made Thu Jun 16 10:56:45 2016 CST using RSA key ID > 86111D4F > gpg: Good signature from "yuriping (0002) <yurip...@sohu.com>" > gpg: WARNING: This key is not certified with a trusted signature! > gpg: There is no indication that the signature belongs to the > owner. > Primary key fingerprint: 826B 7296 F49E AED4 F45B 443C 1907 1CAC 8611 > 1D4F > > How can I solve this problem? > After importing your key, you also need to sign it as "ultimately trusted", which is a geeky way of telling gpg that this is your personal key. This can be done with `gpg --edit-key` and then either `sign` or `trust` (try each of them).
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