{"action":"opened","issue":{"url":"https://api.github.com/repos/maraoz/proofofexistence/issues/33","labels_url":"https://api.github.com/repos/maraoz/proofofexistence/issues/33/labels{/name}","comments_url":"https://api.github.com/repos/maraoz/proofofexistence/issues/33/comments","events_url":"https://api.github.com/repos/maraoz/proofofexistence/issues/33/events","html_url":"https://github.com/maraoz/proofofexistence/issues/33","id":127511154,"number":33,"title":"Unclear how to prove ownership vs existence.","user":{"login":"qm3ster","id":10551234,"avatar_url":"https://avatars.githubusercontent.com/u/10551234?v=3","gravatar_id":"","url":"https://api.github.com/users/qm3ster","html_url":"https://github.com/qm3ster","followers_url":"https://api.github.com/users/qm3ster/followers","following_url":"https://api.github.com/users/qm3ster/following{/other_user}","gists_url":"https://api.github.com/users/qm3ster/gists{/gist_id}","starred_url":"https://api.github.com/users/qm3ster/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/qm3ster/subscriptions","organizations_url":"https://api.github.com/users/qm3ster/orgs","repos_url":"https://api.github.com/users/qm3ster/repos","events_url":"https://api.github.com/users/qm3ster/events{/privacy}","received_events_url":"https://api.github.com/users/qm3ster/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-01-19T18:43:10Z","updated_at":"2016-01-19T18:43:10Z","closed_at":null,"body":">Demonstrating data ownership without revealing actual data. \r\nYou can publicly reveal the digest and if conflict arises you can prove you had the data that generates the digest. Useful for copyrighted material, patents, etc.\r\n\r\nDoesn't say how. I can see at least two ways:\r\n\r\n1. Submitting signed or watermarked documents that can be used as proof to the ownership of both that and the unwatermarked version, by virtue of being dated earlier than yourself or anyone else submitting the unwatermarked version.\r\n2. Submitting a snapshot of your public web page where you list the (submitted) hashes you own every time you update the page.\r\n\r\nNeither method is really optimal (both require extra submissions) and neither is presented on the page.\r\nPerhaps there should be one of the following:\r\n\r\n1. A field for an email address or other public identifier to be hashed and appended (so that the existence of the unique document can be verified without inputting the author).\r\n2. A field for an email address or other public identifier to salt the hash with (which doesn't create extra data, so will not require weaker hashes). This method is identical to manual solution **1** above.\r\n3. Encrypting the file with the author's private key to verify that not only did they possess the file at the date, but were in fact the person responsible for registering it. (So that a third party can not use the feature for defamation.)"}}