"...However, according to RSA Laboratories, "in all of these cases, it is the implementation technique that is patented, not the prime or representation, and there are alternative, compatible implementation techniques that are not covered by the patents." Additionally,Daniel J. Bernstein has stated that he is "not aware of" patents that cover the Curve25519 elliptic curve Diffie–Hellman algorithm or its implementation. RFC 6090, published in February 2011, documents ECC techniques, some of which were published so long ago that even if they were patented any such patents for these previously published techniques would now be expired...."
"...Despite the NSA's ability to crack web encryption with these means, Wired's Kim Zetter notes that "these methods don’t involve cracking the algorithms and the math underlying the encryption, but rather rely upon circumventing and otherwise undermining encryption."
And Snowden himself said during a Q&A with The Guardian in June that cryptography works.
"Properly implemented strong crypto systems are one of the few things that you can rely on," he said...."