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diff --git a/doc/spec/proposals/098-todo.txt b/doc/spec/proposals/098-todo.txt deleted file mode 100644 index e891ea890c..0000000000 --- a/doc/spec/proposals/098-todo.txt +++ /dev/null @@ -1,109 +0,0 @@ -Filename: 098-todo.txt -Title: Proposals that should be written -Version: $Revision$ -Last-Modified: $Date$ -Author: Nick Mathewson, Roger Dingledine -Created: 26-Jan-2007 -Status: Meta - -Overview: - - This document lists ideas that various people have had for improving the - Tor protocol. These should be implemented and specified if they're - trivial, or written up as proposals if they're not. - - This is an active document, to be edited as proposals are written and as - we come up with new ideas for proposals. We should take stuff out as it - seems irrelevant. - - -For some later protocol version. - - - It would be great to get smarter about identity and linkability. - It's not crazy to say, "Never use the same circuit for my SSH - connections and my web browsing." How far can/should we take this? - See ideas/xxx-separate-streams-by-port.txt for a start. - - - Fix onionskin handshake scheme to be more mainstream, less nutty. - Can we just do - E(HMAC(g^x), g^x) rather than just E(g^x) ? - No, that has the same flaws as before. We should send - E(g^x, C) with random C and expect g^y, HMAC_C(K=g^xy). - Better ask Ian; probably Stephen too. - - - Length on CREATE and friends - - - Versioning on circuits and create cells, so we have a clear path - to improve the circuit protocol. - - - SHA1 is showing its age. We should get a design for upgrading our - hash once the AHS competition is done, or even sooner. - - - Not being able to upgrade ciphersuites or increase key lengths is - lame. - - Paul has some ideas about circuit creation; read his PET paper once it's - out. - -Any time: - - - Some ideas for revising the directory protocol: - - Extend the "r" line in network-status to give a set of buckets (say, - comma-separated) for that router. - - Buckets are deterministic based on IP address. - - Then clients can choose a bucket (or set of buckets) to - download and use. - - We need a way for the authorities to declare that nodes are in a - family. Also, it kinda sucks that family declarations use O(N^2) space - in the descriptors. - - REASON_CONNECTFAILED should include an IP. - - Spec should incorporate some prose from tor-design to be more readable. - - Spec when we should rotate which keys - - Spec how to publish descriptors less often - - Describe pros and cons of non-deterministic path lengths - - - We should use a variable-length path length by default -- 3 +/- some - distribution. Need to think harder about allowing values less than 3, - and there's a tradeoff between having a wide variance and performance. - - - Clients currently use certs during TLS. Is this wise? It does make it - easier for servers to tell which NATted client is which. We could use a - seprate set of certs for each guard, I suppose, but generating so many - certs could get expensive. Omitting them entirely would make OP->OR - easier to tell from OR->OR. - -Things that should change... - -B.1. ... but which will require backward-incompatible change - - - Circuit IDs should be longer. - . IPv6 everywhere. - - Maybe, keys should be longer. - - Maybe, key-length should be adjustable. How to do this without - making anonymity suck? - - Drop backward compatibility. - - We should use a 128-bit subgroup of our DH prime. - - Handshake should use HMAC. - - Multiple cell lengths. - - Ability to split circuits across paths (If this is useful.) - - SENDME windows should be dynamic. - - - Directory - - Stop ever mentioning socks ports - -B.1. ... and that will require no changes - - - Advertised outbound IP? - - Migrate streams across circuits. - - Fix bug 469 by limiting the number of simultaneous connections per IP. - -B.2. ... and that we have no idea how to do. - - - UDP (as transport) - - UDP (as content) - - Use a better AES mode that has built-in integrity checking, - doesn't grow with the number of hops, is not patented, and - is implemented and maintained by smart people. - -Let onion keys be not just RSA but maybe DH too, for Paul's reply onion -design. - |