Quantum cryptography could render all our protections worthless soon(ish). But cunning cryptographers have other tricks up their sleeves.
"The KeeLoq [Wikipedia] encryption algorithm is widely used for security relevant applications in the form of passive Radio Frequency Identification (RFID) transponders for physical access control systems, e.g., for garage door opening or building access. We present the first successful DPA (Differential Power Analysis) attacks on numerous commercially available products employing KeeLoq." The paper.
You've probably heard of the WWII Navajo "code talkers" who managed to baffle crack Japanese cryptanalysts and were credited with enabling US success at Iwo Jima. Civil engineer, journalist and photographer Philip Johnston was the determined mind behind the "windtalkers". The son of missionaries, Johnston grew up on a Navajo reservation and was one of only a handful of outsiders fluent in the Navajo language. A bit of his background is included this article, and you can read a complete history of his plan, view an archive of photos by Johnston, and see copies of his enlistment application letter to the Marine Corps commandant, as well as a recommendation letter from the Commanding General. (more inside...)