Network coding has emerged as a promising solution to the highly efficient and reliable network requirements for the next generation communication technology. Network coding enabled small cell environment can assure an efficient device to device communication with the high data rate. However, the security challenges inherent to network coding, like pollution attacks, drags a layer of concern over its implementation. Further, the re-encoding of packets at the intermediate nodes makes it difficult to secure network coding enabled communication using standard cryptographic techniques. Homomorphic message authentication codes and signatures are used to tackle this problem. We propose a network coding enabled small cell environment enhanced by blockchain to prevent pollution attacks. The architecture of this blockchain enhanced SECRET small cell along with an analysis of the communication overhead and latency issues are discussed in this paper.