{"action":"created","issue":{"url":"https://api.github.com/repos/cryptomator/cryptomator/issues/105","labels_url":"https://api.github.com/repos/cryptomator/cryptomator/issues/105/labels{/name}","comments_url":"https://api.github.com/repos/cryptomator/cryptomator/issues/105/comments","events_url":"https://api.github.com/repos/cryptomator/cryptomator/issues/105/events","html_url":"https://github.com/cryptomator/cryptomator/issues/105","id":114765984,"number":105,"title":"Cascade encryption","user":{"login":"jaorueta","id":15626365,"avatar_url":"https://avatars.githubusercontent.com/u/15626365?v=3","gravatar_id":"","url":"https://api.github.com/users/jaorueta","html_url":"https://github.com/jaorueta","followers_url":"https://api.github.com/users/jaorueta/followers","following_url":"https://api.github.com/users/jaorueta/following{/other_user}","gists_url":"https://api.github.com/users/jaorueta/gists{/gist_id}","starred_url":"https://api.github.com/users/jaorueta/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jaorueta/subscriptions","organizations_url":"https://api.github.com/users/jaorueta/orgs","repos_url":"https://api.github.com/users/jaorueta/repos","events_url":"https://api.github.com/users/jaorueta/events{/privacy}","received_events_url":"https://api.github.com/users/jaorueta/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-11-03T08:10:47Z","updated_at":"2015-11-03T09:12:39Z","closed_at":"2015-11-03T09:12:39Z","body":"Implements cascade encryption like TrueCrypt:\r\n- Encrypt plain-text with Serpent\r\n- The result encrypt with Twofish\r\n- The result encrypt with AES\r\n- The result write to file\r\n\r\nEach one must be its IV. The master key should be also cascade encrypted.\r\n\r\nFor the keys derivation, can instruct scrypt to return a lenght of AESKEYLENGTH + TWOFISHKEYLENT + SERPENTKEYLENT bytes, and then split."},"comment":{"url":"https://api.github.com/repos/cryptomator/cryptomator/issues/comments/153293789","html_url":"https://github.com/cryptomator/cryptomator/issues/105#issuecomment-153293789","issue_url":"https://api.github.com/repos/cryptomator/cryptomator/issues/105","id":153293789,"user":{"login":"totalvoidness","id":1204330,"avatar_url":"https://avatars.githubusercontent.com/u/1204330?v=3","gravatar_id":"","url":"https://api.github.com/users/totalvoidness","html_url":"https://github.com/totalvoidness","followers_url":"https://api.github.com/users/totalvoidness/followers","following_url":"https://api.github.com/users/totalvoidness/following{/other_user}","gists_url":"https://api.github.com/users/totalvoidness/gists{/gist_id}","starred_url":"https://api.github.com/users/totalvoidness/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/totalvoidness/subscriptions","organizations_url":"https://api.github.com/users/totalvoidness/orgs","repos_url":"https://api.github.com/users/totalvoidness/repos","events_url":"https://api.github.com/users/totalvoidness/events{/privacy}","received_events_url":"https://api.github.com/users/totalvoidness/received_events","type":"User","site_admin":false},"created_at":"2015-11-03T09:12:39Z","updated_at":"2015-11-03T09:12:39Z","body":"I understand the point, but we will not currently change this for multiple reasons:\r\n\r\n- Unless AES is broken, this will not add any security\r\n- But it does add additional complexity to the system, which is something, every security mechanism wants to avoid, as it adds additional attack surface\r\n- Reviewed and approved concepts have to be re-reviewed\r\n- Performance implications (well at least we could benchmark two encryption layers - sometimes later)\r\n\r\nThis doesn't mean we will not consider it in the future, but currently let's stick with the assumption of AES being unbreakable."}}