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In this work we present the Secure Machine, SeM for short, a CPU architecture extension for secure computing. SeM uses a small amount of in-chip additional hardware that monitors key communication channels inside the CPU chip, and only acts…

密码学与安全 · 计算机科学 2018-03-13 Ofir Shwartz , Yitzhak Birk

We experimentally demonstrate a new widespread read disturbance phenomenon, ColumnDisturb, in real commodity DRAM chips. By repeatedly opening or keeping a DRAM row (aggressor row) open, we show that it is possible to disturb DRAM cells…

硬件体系结构 · 计算机科学 2025-10-20 İsmail Emir Yüksel , Ataberk Olgun , F. Nisa Bostancı , Haocong Luo , A. Giray Yağlıkçı , Onur Mutlu

Deep neural networks (DNNs) are vulnerable to backdoor attacks. Previous works have shown it extremely challenging to unlearn the undesired backdoor behavior from the network, since the entire network can be affected by the backdoor…

密码学与安全 · 计算机科学 2022-10-13 Haotao Wang , Junyuan Hong , Aston Zhang , Jiayu Zhou , Zhangyang Wang

Encryption ransomware has become a notorious malware. It encrypts user data on storage devices like solid-state drives (SSDs) and demands a ransom to restore data for users. To bypass existing defenses, ransomware would keep evolving and…

密码学与安全 · 计算机科学 2022-06-14 Benjamin Reidys , Peng Liu , Jian Huang

Autonomous web agents such as \textbf{OpenClaw} are rapidly moving into high-impact real-world workflows, but their security robustness under live network threats remains insufficiently evaluated. Existing benchmarks mainly focus on static…

密码学与安全 · 计算机科学 2026-03-20 Haochen Zhao , Shaoyang Cui

With the advent of byte-addressable memory devices, such as CXL memory, persistent memory, and storage-class memory, tiered memory systems have become a reality. Page migration is the de facto method within operating systems for managing…

操作系统 · 计算机科学 2024-06-19 Lingfeng Xiang , Zhen Lin , Weishu Deng , Hui Lu , Jia Rao , Yifan Yuan , Ren Wang

With web applications becoming a preferred method of presenting graphical user interfaces to users, software vulnerabilities affecting web applications are becoming more and more prevalent and devastating. Some of these vulnerabilities,…

密码学与安全 · 计算机科学 2019-08-14 Michael Flanders

Windows OS kernel memory is one of the main targets of cyber-attacks. By launching such attacks, hackers are succeeding in process privilege escalation and tampering with users data by accessing kernel mode memory. This paper considers a…

密码学与安全 · 计算机科学 2019-05-31 Igor Korkin

A globally distributed IC supply chain brings risks due to untrusted third parties. The risks span inadvertent use of hardware Trojan (HT), inserted Intellectual Property (3P-IP) or Electronic Design Automation (EDA) flows. HT can introduce…

密码学与安全 · 计算机科学 2024-07-18 Jitendra Bhandari , Rajat Sadhukhan , Prashanth Krishnamurthy , Farshad Khorrami , Ramesh Karri

Host-side page victimizations can easily overflow the SSD internal buffer, which interferes I/O services of diverse user applications thereby degrading user-level experiences. To address this, we propose FastDrain, a co-design of OS kernel…

操作系统 · 计算机科学 2020-06-23 Jie Zhang , Miryeong Kwon , Sanghyun Han , Nam Sung Kim , Mahmut Kandemir , Myoungsoo Jung

We present Serberus, the first comprehensive mitigation for hardening constant-time (CT) code against Spectre attacks (involving the PHT, BTB, RSB, STL and/or PSF speculation primitives) on existing hardware. Serberus is based on three…

密码学与安全 · 计算机科学 2023-09-12 Nicholas Mosier , Hamed Nemati , John C. Mitchell , Caroline Trippel

Several emerging technologies for byte-addressable non-volatile memory (NVM) have been considered to replace DRAM as the main memory in computer systems during the last years. The disadvantage of a lower write endurance, compared to DRAM,…

As a new paradigm in machine learning, self-supervised learning (SSL) is capable of learning high-quality representations of complex data without relying on labels. In addition to eliminating the need for labeled data, research has found…

密码学与安全 · 计算机科学 2023-08-15 Changjiang Li , Ren Pang , Zhaohan Xi , Tianyu Du , Shouling Ji , Yuan Yao , Ting Wang

OS-based page sharing is a commonly used optimization in modern systems to reduce memory footprint. Unfortunately, such sharing can cause Flush+Reload cache attacks, whereby a spy periodically flushes a cache line of shared data (using the…

密码学与安全 · 计算机科学 2019-06-07 Gururaj Saileshwar , Moinuddin K. Qureshi

Intel SGX is known to be vulnerable to a class of practical attacks exploiting memory access pattern side-channels, notably page-fault attacks and cache timing attacks. A promising hardening scheme is to wrap applications in hardware…

密码学与安全 · 计算机科学 2022-12-29 Yuzhe Tang , Kai Li , Yibo Wang , Jiaqi Chen , Cheng Xu

Modern DRAM chips are subject to read disturbance errors. State-of-the-art read disturbance mitigations rely on accurate and exhaustive characterization of the read disturbance threshold (RDT) (e.g., the number of aggressor row activations…

As process technology scales down to smaller dimensions, DRAM chips become more vulnerable to disturbance, a phenomenon in which different DRAM cells interfere with each other's operation. For the first time in academic literature, our ISCA…

分布式、并行与集群计算 · 计算机科学 2016-03-03 Yoongu Kim , Ross Daly , Jeremie Kim , Chris Fallin , Ji Hye Lee , Donghyuk Lee , Chris Wilkerson , Konrad Lai , Onur Mutlu

Temporal memory corruptions are commonly exploited software vulnerabilities that can lead to powerful attacks. Despite significant progress made by decades of research on mitigation techniques, existing countermeasures fall short due to…

密码学与安全 · 计算机科学 2020-10-27 Reza Mirzazade Farkhani , Mansour Ahmadi , Long Lu

The field of web has turned into a basic part in everyday life. Security in the web has dependably been a significant issue. Malware is utilized to rupture into the objective framework. There are various kinds of malwares, for example,…

密码学与安全 · 计算机科学 2020-05-01 R. Geetha Ramani , S Suresh Kumar

Table Retrieval (TR) has traditionally been formulated as an ad-hoc retrieval problem, where relevance is primarily determined by topical semantic similarity. With the growing adoption of LLM-based agentic systems, access to structured data…

信息检索 · 计算机科学 2026-05-04 Rihui Jin , Yuchen Lu , Ting Zhang , Jun Wang , Kuicai Dong , Zhaocheng Du , Dongping Liu , Gang Wang , Yong Liu , Guilin Qi