Abstract: End Spreading is proposed to solve the problem of synchronization authentication in high-speed End Hopping system, which expresses the identity information as the extended sequence composed of several independent end information and protects the security and privacy of identity information well.However, the End Spreading sequence generated by the existing algorithm has poor pseudo-randomness and weak anti-analysis ability, which is not conducive toensuring the security and privacy of the original data.Therefore, the m-sequencewasintroduced into the generation process for the first time and proposes the generation mechanism of End Spreading based on m-sequence, making it have great confidentiality and pseudo-randomness. Secondly, the modules involved in this mechanism are discussed in detail, such as message preprocessing, m-sequence generation and modulation, and End Spreading sequence generation. Then, the characteristics equipped by the End Spreading sequence generated by the generation mechanism based on m-sequence are analyzed theoretically, like concealment, loss-tolerance, and anti-interference.Finally, the performance tests are conducted and the existing algorithm is regarded as the comparison scheme.The test results show that the End Spreading sequence generated by the generation mechanism based on m-sequence has better pseudo-randomness and robustness, which is of great significance to guarantee the security and reliable transmission of secret information.