Notices where this attachment appears
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"99% of the PGP-encrypted emails we get to security@golang.org are bogus security reports. Whereas “cleartext” security reports are only about 5-10% bogus. Getting a PGP-encrypted email to security@golang.org has basically become a reliable signal that the report is going to be bogus, so I stopped caring about spending the 5 minutes decrypting the damn thing (logging in to the key server to get the key, remembering how to use gpg)."
https://bridge.grumpy-troll.org/2017/04/golang-ssh-redux/