This paper investigates the privacy and usability of AI-enabled smart devices commonly used by youth, focusing on Google Home Mini, Amazon Alexa, and Apple Siri. While these devices provide convenience and efficiency, they also raise privacy and transparency concerns due to their always-listening design and complex data management processes. The study proposes and applies a combined framework of Heuristic Evaluation, Personal Information Protection and Electronic Documents Act (PIPEDA) Compliance Assessment, and Youth-Centered Usability Testing to assess whether these devices align with Privacy-by-Design principles and support meaningful user control. Results show that Google Home achieved the highest usability score, while Siri scored highest in regulatory compliance, indicating a trade-off between user convenience and privacy protection. Alexa demonstrated clearer task navigation but weaker transparency in data retention. Findings suggest that although youth may feel capable of managing their data, their privacy self-efficacy remains limited by technical design, complex settings, and unclear data policies. The paper concludes that enhancing transparency, embedding privacy guidance during onboarding, and improving policy alignment are critical steps toward ensuring that smart devices are both usable and compliant with privacy standards that protect young users.

翻译：本文研究了青少年常用的AI智能设备的隐私保护与可用性，重点关注Google Home Mini、Amazon Alexa和Apple Siri。这些设备虽提供了便利与效率，但其持续监听的设计与复杂的数据管理流程也引发了隐私与透明度方面的担忧。本研究提出并应用了一个综合评估框架，结合启发式评估、《个人信息保护与电子文件法》（PIPEDA）合规性评估以及以青少年为中心的可用性测试，以评估这些设备是否符合隐私设计原则并支持有效的用户控制。结果显示，Google Home在可用性方面得分最高，而Siri在法规遵从性方面得分最高，这表明用户便利性与隐私保护之间存在权衡。Alexa在任务导航方面表现更清晰，但在数据留存透明度方面较弱。研究发现表明，尽管青少年可能认为自己有能力管理个人数据，但其隐私自我效能仍受技术设计、复杂设置及不明确的数据政策的限制。本文结论指出，增强透明度、在初始设置阶段嵌入隐私指引以及提升政策一致性，是确保智能设备既具备良好可用性又符合保护年轻用户的隐私标准的关键步骤。