I use the following GnuPG key to sign my mails and you can use it to encrypt your mails:

    pub   rsa4096 2016-08-27 [SC] [expire : 2018-08-27]
          9B79 7754 00E2 23C7 FC90  E5C6 E5D9 1B2F 0BD5 3C6A
          uid          [  ultime ] t0x0sh <tosh@t0x0sh.org>

My key can be found on my repository or on a key server.

Before using it, verify the key fingerprint with multiple channels (like Twitter or/and IRC).