pub nistp521 2018-02-21 [SC] 1E56 5FA7 B310 CFC1 B144 D93C 2DFE 3408 5E97 CE47 uid [ultimate] Shugo Maeda <shugo@netlab.jp> uid [ultimate] Shugo Maeda <shugo@ruby-lang.org> uid [ultimate] Shugo Maeda <shugo@debian.org> sub nistp521 2018-02-21 [E]