Torを用いた通信は暗号を破らなくても解読可能？

下記の記事が出ている。

　MIT researchers can break Tor anonymity without even touching encryption
　BGR: July 30, 2015　
　http://bgr.com/2015/07/30/mit-researchers-can-break-tor-anonymity-without-even-touching-encryption/

　MIT researchers have bad news for users of anonymity browser Tor
　Business Insider: August 3, 2015　
　http://www.businessinsider.com/mit-researchers-has-some-bad-news-for-users-of-anonymity-browser-tor-2015-8