The China Academy of Information and Communications Technology (CAICT) carried out a specialized capability evaluation in accordance with the 'Technical Specifications for End-Cloud Collaborative Confidential Computing.' Doubao Mobile Assistant successfully navigated through three key inspection areas: security of the end-side business system, end-cloud collaborative security, and cloud-cloud collaborative security. It received an L5 capability rating, making it one of the inaugural products in China to achieve this milestone. The evaluation encompassed 15 sub-items and five distinct security capability levels, with the overarching goal of comprehensively verifying the confidential computing technical prowess of intelligent assistants. Doubao Mobile Assistant leverages an end-cloud collaborative confidential computing architecture, delivering robust privacy protection through its technical framework and business processes. This ensures end-to-end security for information transmission, storage, computation, and inference. The consumer version of Doubao Mobile Assistant has been officially launched, offering support for multiple wake-up methods. The dedicated AI key incorporates fingerprint authentication, and the voice wake-up feature has been fine-tuned for a variety of scenarios. The inaugural version will be integrated into the Nubia NaviX Ultra.