-- Spoiled Onions: Exposing Malicious Tor Exit Relays

(PDF) http://cryptome.org/2014/01/spoiled-onions.pdf
http://www.cs.kau.se/philwint/spoiled_onions/

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-- What the "Spoiled Onions" paper means for Tor users
https://blog.torproject.org/blog/what-spoiled-onions-paper-means-tor-users

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-- Scientists detect "spoiled onions" trying to sabotage Tor privacy network
Rogue Tor volunteers perform attacks that try to degrade encrypted connections.

http://arstechnica.com/security/2014/01/scientists-detect-spoiled-onions-trying-to-sabotage-tor-privacy-network/