Abstract: Wireless mediums open nature are capable for intentional interference attacks referred as jamming. This attacks paved a way for denial-of-service attacks on wireless networks. The intruder with immense knowledge of protocol specifications and network secrets can create low-effort jamming attacks that are difficult to detect and counter. In these attacks, the intruder is active only for a short period of time, selectively targeting messages of high importance. However, selective jamming attacks can be launched by performing real-time packet classification at the physical layer. To prevent these attacks, three schemes are developed to avoid real-time packet classification by combining cryptographic primitives with physical-layer attributes. Here, the security of the proposed methods is analyzed.