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Zhe Zhou

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Trace-Guided Synthesis of Effectful Test GeneratorsPLDI 20262026-06-15
Underapproximate type-and-effect specs (U-hats) plus a small typed DSL synthesize effectful test generators that interact with black-box systems rather than…
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We’ve Got You Covered: Type-Guided Repair of Incomplete Input GeneratorsOOPSLA 20252025-10-16
A tool called Cobb repairs incomplete OCaml input generators by synthesizing code that fills typed holes so the generator’s range includes every valid input…
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From Traces to Program Incorrectness: A Type-Theoretic ApproachTPSA 20252025-01-19
Claims a type-theoretic, underapproximate correctness method that treats library interactions as traces encoded with symbolic regular expressions and reasoned…
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Derivative-Guided Symbolic ExecutionPOPL 20252025-01-19
Framework builds a symbolic execution for functional code that calls opaque, effectful libraries, encoding LTLf specs as symbolic finite automata and using…
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A HAT Trick: Automatically Verifying Representation Invariants using Symbolic Finite(…)PLDI 20242024-06-24
Describes a toolchain that uses symbolic finite automata to encode data-dependent, temporal representation invariants and integrates them into a refinement…
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Type-Based Incorrectness ReasoningIncorrectness 20242024-01-17
Claims that coverage types extend refinement types to give underapproximate reasoning that verifies completeness of nondeterministic test generators, and shows…
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Userspace Bypass: Accelerating Syscall-intensive ApplicationsOSDI 20232023-07-10
Userspace Bypass (UB) transparently moves short user-space instruction sequences into kernel space by identifying hot fast paths, translating them into a…
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Covering All the Bases: Type-Based Verification of Test Input GeneratorsPLDI 20232023-06-17
Claims a new coverage types system that interprets refinements as underapproximate reasoning and verifies whether generators actually produce every value in a…
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PetS: A Unified Framework for Parameter-Efficient Transformers ServingUSENIX ATC '222022-07-11
PetS is a serving framework that decouples PET methods into shared operators and lightweight task-specific PET operators, implements a Python front end with a…
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Data-Driven Abductive Inference of Library SpecificationsOOPSLA 20212021-10-17
Tool named Elrond infers specifications for black‑box OCaml libraries by combining random testing, SMT counterexample-guided refinement, and an abduction loop…
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SaFace: Towards Scenario-aware Face Recognition via Edge Computing System3rd USENIX Workshop on Hot Topics in Edge Computing (HotEdge '20)2020-06-25
Prototype implements a three-layer edge system that pretrains a CNN in the cloud, runs detection/alignment/tracking on smart cameras, and does inference plus…
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All Your Payment Tokens Are Mine: Vulnerabilities of Mobile Payment SystemsBlack Hat Asia 20182018-03-20
Shows that offline mobile payment tokens sent over QR, audio or MST are trivially sniffed and replayed: researchers extend MST range to 2-meter MST sniff…
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Picking Up My Tab...26th USENIX Security Symposium (USENIX Security '17)2017-08-16
Researchers demonstrate a practical attack called Synchronized Token Lifting and Spending (STLS) that sniffs an offline payment token on NFC/MST, audio or…
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