That's the fingerprint of your key. A public key looks like this: -----BEGIN PGP PUBLIC KEY BLOCK----- mQINBFDRF/8BEACv5LQiS92xKzjw91oDbwOYzNocIPsvRn5rZWf6e/ivSKcN6Wsb U21UtQXitwst3bqm7oFGcxbwDgzhU+q4eGL3p1j4KqBV3Sg3c0SJ9AMGvernA9Pr b8fbbeFCQ/geqFphaQO0GniYyJARrjcCHNpx3OfSZtDyP0TmhYgk8+rwx8mwJT1h HZ+rLio9Ta1CSEPeRF+redUi3BnuEKLasEPi4iwBZ+wovZm23oHMCoOTP4u+x/GC ItbaX84DUKmCslNADZqSarBLYc+uB5oU5cPvHu64eJYFMd2ZCTr+w8m7hTzwNYi6 oyVX8W0BNNFq1TO1XPhTLe8hMm4zDhFniq3rD8bCfuowK4J+R2hshFAi8DX5pbaA 2i5EdXjdytdpvo99CI+vH9smcjyQsJNE9gSkBcsooBhKXWRwY0GdXg56GIQyssNg DAAKCRDQHKKYcG7iB+bpD/4w7r8xJ6S7z0TUoZDo7/UsIvPtjGAlJdcsivxF0EkI W/VTgg27VFc0vYn2ddsqvSxiVAy2fEuSXdF39vDzTwxKmfEuroXIEz73Sp0KH5Cy j8XoGQuIG7oOVwY8egsIFsHIkfbuUPq1teUmEp3UgCdv0CGM3yV9nRK2BY1yN4F2 S7fgWluu9q/XVHQE4mugQV83ULsu63clcqlbFd3azhAd5b/S/VUBDDambRwXfOKE 950Dpm/Q8S9qLrsub7Axkqcv0WN3pfz45x5hzqCNaM2TWL7b0SxGL0ORYJPUKPTW /pT8MXGCvmfws6yvBnzULm1fWgy5/xTZabnVKvWregPlzAweNRBXdVXBED9spxqJ cRuGO5kVRtkH/Kf6E4qYi/VHIwA6JKZngXM2ZKHJv2DgcgWDDuxWclqpngX5mQ/5 J7UHmp/xIBTmOVqiSAOXtCcMqeWeG01CLwMj18g9AkRVaqwsobUOIgRP1hSEe2W+ JDsJHdsq+dTxecUnhg/m+ivfboJQbBeqsOvNZyyDa2Naa0NpfGD30ZUHITUzgxRA 6+qNqZ8a2qimTe4aZ3Wwp9exYLy91Sx/nOtuh5EUsVeCKmSrPAUrPkSsC5RTeQYp 4GdkPVR08lsBz0r54B6BSPKAD2ybfPl523XIK3YBczxVFW1h6bUsAQCUvBJsgabC mw== =i8Ra -----END PGP PUBLIC KEY BLOCK----- Did you follow the GPG4USB tutorial? It tells you how to export your public key (copy it to the clipboard), which you can then paste into a forum post.