In mobile open Internet Protocol TV (IPTV) which is one of the major attracting technologies recently, the security is a key issue for reliable service, because the mobility and the openness in IPTV could cause much more vulnerabilities to various attacks compared with traditional IPTV services. In this paper, we propose an energy-efficient and secure channel group key establishment and rekeying management scheme for mobile open IPTV services. Our scheme provides the data authentication between an Evolved Node B (eNB) or a Base Station and the mobile devices for the security enhancement and efficiently rekeys the group key when the membership changes. Additionally, it proposes a pairwise key establishment mechanism for open IPTV services through eNBs. Our proposal can cope with the security vulnerability in mobile open IPTV services and guarantee the secure group key rekeying in addition to decreasing the storage and communication overhead.