Encrypted traffic being intercepted

lucag writes: It appears that most of the encrypted traffic over the net is currently being intercepted and in some way decoded by NSA.
Here there are some references, unfortunately scant on the details that matter; actually it is not clear if it is broken algorithms, compromised protocols, MITM attacks or just plain old simple "enforced" cooperation by the providers.

http://www.theguardian.com/world/2013/sep/05/nsa-gchq-encryption-codes-security

http://www.nytimes.com/2013/09/06/us/nsa-foils-much-internet-encryption.html?smid=tw-nytimes&_r=0