Hi everyone! For the past week, I have shifted my focus to the main sub-project of continuous scanning in Exitmap. What we'll be trying to achieve is having the Exitmap utility running in the background and running the various modules. This report recounts one week worth of work since my 2nd report was on 26th June. Work done: --------------- 1. Wire-framed the structure of how continuous scanning will work. Major components that will be focused on are (a) Periodically updating the network consensus to scan for new or previously invisible exit nodes for malicious behaviour, (b) A mechanism that keeps a close eye on some exit nodes while does not care much for nascent exit relays or well established guard nodes, and (c) Add as much randomization as possible for these scans to make it more difficult for a malicious exit relay to distinguish regular traffic from scanner activity. 2. IRC meeting with my primary mentor Philipp Winter (phw) to discuss some of the features and how will go about implementing them. Some points arrived at from the discussion: a. Need to create an asynchronous element for periodically fetching consensus data and to integrate the element with the existing Exitmap functionality. b. Find a way to update the Tor micro-descriptors and use new consensus for the modules. I still need to find a way to programmatically force the Tor client to update its consensus at the moment specified. Damian Johnson (atagar) advised me to use the FetchDirInfoEarly parameters that helps. If anyone has any more information about this, it would help a lot. I will be scouring through the control-spec for the same. c. Create an algorithm to give more weightage to some exit nodes from consensus depending on what the criteria is. We need to come up with a selection mechanism that selects nodes visible in the say 0-24 hours time frame but is not a node that has just come or has been around the Tor network for some time. Some research still needed on this aspect. Have a great weekend everyone! -- Mridul (mtyamantau) ============================= PGP keyID: 0xb716e33ab6d0a653