2009/8/31 James Alexander jamesofur@gmail.com:
How would the blame maps work with people editing around vandalism? For example someone either blanks the page or does extensive vandalism to it (especially over the course of a couple days or a couple users). I would imagine it would be fairly easy if the bad contributions just got rolledback but would the old blamemaps still be reinstated if someone went in and manually copy/pasted the old version (or something very close) in or would the system count it as a new contribution?
I haven't been following this in any particular detail - I have no intent of using the system! - but this is certainly an issue they have thought of and planned for; they currently describe the system as "robust to cut-and-pase, delete-and-reinsert, and most type of attacks..."
I suspect the papers linked at the bottom here - http://wikitrust.soe.ucsc.edu/index.php/Main_Page - go into a bit more detail about the algorithm.