The intrinsic random nature of quantum physics offers novel tools for the generation of random numbers, a central challenge for a plethora of fields. Bell non-local correlations obtained by measurements on entangled states allow for the generation of bit strings whose randomness is guaranteed in a device-independent manner, i.e. without assumptions on the measurement and state-generation devices. Here, we generate this strong form of certified randomness on a new platform: the so-called instrumental scenario, which is central to the field of causal inference. First, we theoretically show that certified random bits, private against general quantum adversaries, can be extracted exploiting device-independent quantum instrumental-inequality violations. Then, we experimentally implement the corresponding randomness-generation protocol using entangled photons and active feed-forward of information. Moreover, we show that, for low levels of noise, our protocol offers an advantage over the simplest Bell-nonlocality protocol based on the Clauser-Horn-Shimony-Holt inequality.

量子物理学的固有随机性质为产生随机数提供了新颖的工具，这是众多领域的主要挑战。通过对纠缠态的测量获得的贝尔非局部相关性允许生成位串，其比特随机性以与设备无关的方式得到保证，即无需对测量和状态生成设备进行假设。在这里，我们在新平台上生成这种强大的认证随机性形式：所谓的工具场景，这是因果推理领域的核心。首先，我们从理论上证明，可以利用与设备无关的量子仪器不等式违规来提取针对一般量子对手的认证随机比特。然后，我们通过纠缠光子和主动信息前馈实验性地实现了相应的随机性生成协议。此外，我们表明，对于低噪声水平，与基于Clauser-Horn-Shimony-Holt不等式的最简单的Bell非局部性协议相比，我们的协议具有优势。