We propose a lightweight secure identity authentication encryption (CH-CNA) mechanism based on the cryptographically generated address (CGA) algorithm and the hash generated address (HGA) algorithm to satisfy the strict security requirements of all the parties in the internet multi-servicing context while reducing the cost that is typically associated with the introduction of security mechanisms. In particular, the proposed mechanism analyzes the communication security challenges faced by the software-defined optical access networks (SDOAN). The CH-CNA mechanism follows the information interaction method of the OpenFlow protocol, and the first and non-first authentication bindings are achieved among the communication nodes using the CGA and HGA algorithms without any third-party participation. During the authentication binding process, the attacker is prevented from forging or tampering with the authentication interaction messages, establishing an end-to-end trusted connection in the access network. The proposed CH-CNA mechanism is tested using the OMNeT++ network simulation software. The experimental results demonstrate that the proposed mechanism can reduce the average computational overhead and blocking rate because of malicious attacks and ensure secure interaction among the communication nodes, which conforms to the definition of lightweight.