Spoofing over time

These graphs plot the spoofability of the IP blocks and ASes that we have observed since the beginning of collection, at a granularity of 30 days. In order to prevent visual clutter, all tests since 6 months before the specified date are included in the spoofability calculation, and all the "inconsistent" prefixes or ASes are considered to be "spoofable". We do not use the same aggregation method as we do with the pie charts, because we want to record changes within prefixes and ASes instead of determining their current state. In addition, the number of tests given are only for the previous month, not the previous 6 months as with the spoofability values. Tests that couldn't evaluate whether spoofing or blocking occur are excluded.