China's Hacking of the Border Gateway Protocol
This is a long—and somewhat technical—paper by Chris C. Demchak and Yuval Shavitt about China’s repeated hacking of the Internet Border Gateway Protocol (BGP): “China’s Maxim Leave No Access Point Unexploited: The Hidden Story of China Telecom’s BGP Hijacking.”
BGP hacking is how large intelligence agencies manipulate Internet routing to make certain traffic easier to intercept. The NSA calls it “network shaping” or “traffic shaping.” Here’s a document from the Snowden archives outlining how the technique works with Yemen.
EDITED TO ADD (10/27): Boing Boing post.