In this paper, we propose and evaluate a method of generating low-cost device signatures for distributed wireless brain implants, using a Pseudo-Random Binary Sequence (PRBS) Generator that utilizes a modified Ring-Oscillator-based Physical Unclonable Function (RO-PUF). The modified RO-PUF's output is used as a seed for the PRBS generator, which creates a multi-bit output that can be mapped to a time-slot when the implant is allowed to communicate with the external world using duty-cycled time-division multiplexing. A 9-bit PRBS generator is shown in hardware (with a TSMC 65 nm test chip implementation) that demonstrates < 100 nW Power consumption in measurement (72% lower power and 78% lower area than a traditional 9-bit RO-PUF implementation), which supports 26 implants with the probability of time-slot collision being < 50%. This potentially creates a pathway for low-cost device signature generation for highly resource-constrained scenarios such as wireless, distributed neural implants.

翻译：本文提出并评估了一种为分布式无线脑部植入设备生成低成本器件签名的方法，该方法采用基于改进型环形振荡器物理不可克隆函数（RO-PUF）的伪随机二进制序列（PRBS）生成器。改进型RO-PUF的输出被用作PRBS生成器的种子，生成可映射至特定时隙的多位输出，从而控制该植入设备通过占空比时分复用与外部世界通信的许可时段。本文在硬件层面（采用TSMC 65纳米测试芯片实现）展示了一个9位PRBS生成器，其测量功耗低于100 nW（较传统9位RO-PUF实现降低72%功耗，面积减少78%），可支持26个植入设备，其时隙碰撞概率低于50%。该方法为资源高度受限场景（如无线分布式神经植入设备）的器件签名生成提供了一条低成本实现路径。