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Decay-Based DRAM PUFs in Commodity Devices

机译：商品设备中基于衰减的DRAM PUF

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摘要

A Physically Unclonable Function (PUF) is a unique and stable physical characteristic of a piece of hardware, which emerges due to variations in the hardware fabrication processes. Prior works have demonstrated that PUFs are a promising cryptographic primitive that can enable secure key storage, hardware-based device authentication and identification. So far, most PUF constructions have required an addition of new hardware or an FPGA implementation for their operation. Recently, intrinsic PUFs, which can be found in commodity devices, have been investigated. Unfortunately, most of them suffer from the drawback that they can only be accessed at boot time. This paper focuses on a new class of run-time accessible, decay-based, intrinsic DRAM PUFs in commercial off-the-shelf systems, which requires no additional hardware or FPGAs. In order to enable secure key storage using DRAM PUFs, this work presents a new Helper Data System (HDS) specifically tailored to the properties of the decay process inherent to DRAM cells. The decay-based DRAM PUF and the new HDS are evaluated on commodity off-the-shelf devices to demonstrate their practicality. Furthermore, a novel lightweight protocol is presented that allows for mutual authentication.
机译：物理上不可克隆的功能（PUF）是硬件的唯一且稳定的物理特性，由于硬件制造工艺的变化而出现。先前的工作表明，PUF是一种很有前途的加密原语，可以实现安全的密钥存储，基于硬件的设备身份验证和识别。到目前为止，大多数PUF构造都需要为其操作添加新的硬件或FPGA实现。最近，已经研究了可以在商用设备中找到的固有PUF。不幸的是，它们中的大多数都有只能在启动时访问的缺点。本文着重于商用现成系统中的一类新型的运行时可访问，基于衰变的固有DRAM PUF，它不需要额外的硬件或FPGA。为了使用DRAM PUF进行安全的密钥存储，这项工作提出了一种新的辅助数据系统（HDS），专门针对DRAM单元固有的衰减过程的特性进行了定制。基于衰减的DRAM PUF和新的HDS在现成的商用设备上进行了评估，以证明其实用性。此外，提出了一种新颖的轻量级协议，该协议允许相互认证。

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