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植入设备生成低成本设备签名的方法，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的输出作为PRBS生成器的种子，生成多比特输出，该输出可映射至植入设备允许与外界通信的时隙（采用占空比时分复用）。基于TSMC 65 nm测试芯片实现的9比特PRBS生成器在测量中功耗低于100 nW（相比传统9比特RO-PUF实现，功耗降低72%，面积减少78%），支持26个植入设备，其时隙碰撞概率低于50%。这为在高度资源受限场景（如无线分布式神经植入设备）中实现低成本设备签名生成开辟了可行路径。