arXiv Machine Learning

CPU-Auth: Device Fingerprinting for Authentication via DVFS Side-Channel

CPU-Auth is a novel authentication method that uses unique variations in a device’s CPU, measured via the Dynamic Voltage and Frequency Scaling (DVFS) governor from a browser, to create a hardware-based device fingerprint. The approach is evaluated on over 50,000 data traces using distance‑based and deep learning techniques. The study highlights how CPU-Auth could serve as a secondary authentication factor, addressing flaws in existing methods such as SMS, biometrics, and token‑based systems.

arXiv Computer Vision
Aug 28

Binding Biometrics with AI Agent Identifiers for Delegation of Authority

The paper introduces BIND, a framework that binds a human’s biometric data to an AI agent’s identity and task-specific authority, enabling secure, real‑time delegation of control. By generating a token that an AI agent presents to an Identity Auditor, the system performs biometric authentication and recovers the agent’s ID and scope, providing non‑repudiable proof of human oversight. A practical implementation using face features and a fuzzy commitment scheme with turbo error‑correcting codes achieves a 96% true match rate at zero false match rate and supports 1024‑bit agent tokens.

By Joseph Geo Benjamin, Anil K Jain, Karthik Nandakumar
arXiv Machine Learning
Aug 24

RouteScan: A Non-Intrusive Approach to Auditing MoE LLMs Safety via Expert Routing Telemetry

RouteScan is a non‑intrusive auditing framework that detects harmful behavior in Mixture‑of‑Experts (MoE) large language models by analyzing expert‑routing telemetry captured from GPU execution. It uses the number of active GPU threads during the prefilling phase as a micro‑architectural fingerprint to isolate cross‑domain risk indicators and precisely identify malicious prompts. Evaluations on four open‑source MoE LLMs show strong generalization with AUROC > 0.91 on unseen harmful domains, while privacy tests indicate that full prompts cannot be reliably recovered from aggregated telemetry.

By Bo Lv, Zhiheng Xu, KeDong Xiu, Ruyi Ding, Tianhang Zheng, Zhibo Wang, Kui Ren
arXiv AI
Aug 12

A Gateway Architecture for Enterprise MCP Authentication: Unifying Heterogeneous Auth, Identity Delegation, and the User / Non-User Persona Problem

arXiv:2608. 10760v1 Announce Type: cross Abstract: The Model Context Protocol (MCP) has become the de-facto interface for connecting LLM agents to enterprise tools, and adoption has been explosive: within a year, large organizations went from zero to dozens of internally built MCP servers.

By Suraj Kumar, Amy Wang, Srinivasan Manoharan