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New PUF-based Protocol for Improved Data Security and Authentication

Researchers from Kansas State University have developed an improved PUF-based protocol known as the reliable and lightweight authentication protocol (PUF-RLA). 

The proposed scheme makes the system more reliable against errors and adversarial attacks, using the following features:

  • Obfuscation of identity (Challenge-Response Pairs or CRPs) of the devices. The adversary cannot obtain CRPs by utilizing passive or active attacks, and hence no model could be generated for any device.

  • Unlike most previous approaches, this PUF circuit is not directly accessible. This prevents the device from side channel analysis attacks, as well as machine learning attacks.

  • The control logic keeps the PUF secure from brute force and modelling attacks.

  • The response accuracy is also expected to be superior to previous approaches as the server contains the error correction codes (helper data)

Advantages:

  • Superior Security Features: The proposed scheme utilizes an exponential increase in challenge-response pairs. This, along with the lack of server’s involvement in storing this information, helps overcome a major security drawback in existing Arbiter PUFs.

  • Stronger Resilience: It aims to provide stronger resilience against security attacks, including both passive and active attacks during authentication phase.

  • Robust Protection: The PUF-RLA is expected to be robust against brute force, replay, and modeling attacks.

  • Protection from Server Breach: No partial/full CRPs or soft models associated to a PUF within a device are stored, generated, transmitted, or received by the server during authentication events. Hence, the system would not be vulnerable to possible server breaches.

  • Super Response Accuracy: It is expected to provide a response accuracy of 99.9% with error correction coding on the server.

  • Lightweight: As opposed to previous approaches which utilize cryptographic hash functions with high hardware overhead within the device, PUF-RLA scheme provides an extremely lightweight, low hardware cost, dynamic obfuscation mechanism without compromising the security. Moreover, PUF-RLA employs error correction scheme in the server instead of the device thus enabling the device to be lightweight while also enhancing the reliability of the PUF responses.

Commercial Application:

Applicable towards all PUF-based data security and authentication solutions, such as RFID tags and IoT devices.

 

Additional Details

Owner

Kansas State University

Intellectual Property Protection

Pending Patent



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