I'm bullish on using nostr for what PGP tried to be 

nostr:nevent1qqstmvhvyl5stxg2t4zkw3f4cne6pl2wggqau2fhd5c6qns4wct74dspz9mhxue69uhkummnw3ezuamfdejj7q3qgcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqxpqqqqqqzfsm8vk