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DOI： 10.1587/transinf.2016INP0020

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Publishing type：Part of collection (book)   Publisher：Springer Nature Switzerland  

DOI： 10.1007/978-3-031-86149-9_11

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DOI： 10.20729/00240596

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DOI： 10.1007/978-981-96-3531-3_11

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DOI： 10.20729/00239255

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DOI： 10.58346/JISIS.2024.I3.018

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DOI： 10.1007/s10207-024-00890-4

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DOI： 10.52731/iee.v10.i1.794

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DOI： 10.1007/978-981-99-8024-6_12

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DOI： 10.2197/ipsjjip.31.788

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DOI： 10.1145/3630202.3630222

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DOI： 10.1109/CANDAR60563.2023.00029

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DOI： 10.1109/CANDARW60564.2023.00051

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DOI： 10.1109/CANDARW60564.2023.00052

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DOI： 10.1109/CANDARW60564.2023.00055

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DOI： 10.1587/transinf.2022ICP0004

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DOI： 10.1587/transinf.2022ICP0013

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DOI： 10.2197/ipsjjip.31.578

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DOI： 10.1007/978-3-031-39828-5_4

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DOI： 10.15803/ijnc.13.2_273

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DOI： 10.1109/ICCCI59363.2023.10210171

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DOI： 10.1007/978-3-031-25659-2_16

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DOI： 10.2197/ipsjjip.30.796

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DOI： 10.2197/ipsjjip.30.807

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DOI： 10.1109/CANDARW57323.2022.00069

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DOI： 10.20729/00220078

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DOI： 10.2197/ipsjjip.30.601

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DOI： 10.2197/ipsjjip.30.563

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DOI： 10.1007/978-3-031-15255-9_4

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DOI： 10.1007/978-3-031-15255-9_5

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DOI： 10.1109/IIAIAAI55812.2022.00028

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DOI： 10.1109/IIAIAAI55812.2022.00031

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DOI： 10.18420/OID2022_07

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Other Link： https://dblp.uni-trier.de/db/conf/openidentity/openidentity2022.html#NorimatsuNY22

Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1007/978-3-030-99587-4_40

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DOI： 10.22667/JISIS.2022.02.28.026

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/CANDARW53999.2021.00066

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Authorship：Last author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

One of the methods to attack mobile devices is redirecting a user to unwanted websites. To the best of our knowledge, there is no method to generate a blacklist that focuses on such attacks. Therefore, we propose a method to generate a blacklist for mobile devices by searching malicious websites. To detect new malicious websites, this method collects HTML files from the webspace using a crawler and searches for HTML files highly likely to be malicious using keywords extracted from known malicious websites. In the evaluation, we performed detection experiments with the blacklist generated by the proposed method using the demonstration experiment data. The evaluation results showed that the generated blacklist detects malicious websites used in attacks of redirecting a user to unwanted websites with few false positives. In addition, new malicious websites were discovered using the generated blacklist; furthermore, we describe an analysis of attacks of redirecting a user to unwanted websites.

DOI： 10.20729/00212759

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DOI： 10.1007/978-3-030-85987-9_3

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Springer  

DOI： 10.1007/978-3-030-84913-9_22

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DOI： 10.1007/978-3-030-85987-9_4

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DOI： 10.1109/ACCESS.2021.3101452

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In the recent cloud computing environment, many short-lived processes are created, a method of realizing a service by mutual cooperation of these processes has been attracting attention. Therefore, speeding up the process creation is very important. Tender OS, thus, proposes a mechanism for fast process creation and deletion. The proposed mechanism involves the recycling of process resources. However, the proposed mechanism cannot recycle process resources during process creation if the stored process resources are not adequate. Stored process resources may increase monotonically if they are not recycled for process creation, which in turn can cause memory starvation. This paper, therefore, proposes a resource pooling function for addressing the these problems. In addition to the function for resource recycling, the resource pooling function incorporates the resource creation function and the resource reduction function. Furthermore, this paper reports the effectiveness of the resource pooling function in terms of processing time efficiency and memory usage.

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Advances in Intelligent Systems and Computing  

DOI： 10.1007/978-3-030-57811-4_32

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)  

DOI： 10.1007/978-3-030-65299-9_8

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/CANDARW51189.2020.00070

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Privilege escalation attacks that exploit operating system vulnerabilities can cause significant damage to the associated systems. We previously proposed an additional kernel observer (AKO), a prevention method that focuses on modifying process privileges by system calls. AKO verifies the modification in process privilege data and monitors the modification in privilege data by storing them in the kernel stack before processing the system call. However, if an attacker identifies the storage location of privilege data in the kernel stack and alters both process privilege data and privilege data in the kernel stack while the system call is being processed, AKO can be bypassed. Hence, in this paper, we propose a new method for preventing privilege escalation attacks in the 64-bit ARM environment as well as AKO for protecting mobile devices and IoT devices. To address the issues of AKO, the new method protects the stored privilege data employing the ARM TrustZone technology. In this paper, the new method's design, implementation, and evaluation results are described. In the evaluation, we performed a privilege escalation attack detection experiment using an exploit code and measured performance of system calls and applications. The evaluation results showed that protection by attack detection was successful and the performance degradation due to this method was limited.

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Privilege escalation attacks can lead to system tampering and information leakage. To address such attacks, we previously proposed a privilege escalation attack prevention method that focus on the modification of privileges by system calls. However, the said method needs to be implemented in the operating system (OS), and its application thus requires alteration of the kernel source code. Additionally, privilege data stored in the kernel space may be forged by attackers. To address these issues, we propose a new method in this paper for preventing privilege escalation attacks by employing KVM, (a virtual machine monitor). The new method hooks the system call invoked in the guest OS and verifies the modification of privileges through system call processing. Application of the new method does not require alteration of the kernel source code. Furthermore, forging of privilege data is deterred by storing privilege data in the memory of the host OS. In this paper, drawbacks of the previously proposed method are discussed, and the new proposed method and its evaluation results are described.

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Application of SELinux involves incorporating a general security policy that permits redundant privileges for individual systems. Hence, we previously proposed a method that eliminates redundant policies from the general policy. However, the said method cannot be applied when there is no policy source file or policies include an attribute that is not supported. During eliminating policies period, the log of access permitted by a particular policy is continually produced as an output, and the associated overhead is large. Furthermore, redundant policies in the base module cannot be eliminated. To address these issues, we propose a new method that extends the previously proposed method. The new method involves the processing of files written in SELinux CIL (an intermediate language) for eliminating redundant policies. Additionally, the new method considers attributes and eliminates policies with fine granularity. The overhead is reduced by eliminating the auditallow statement associated with the policy once converted to the policy format from the policy. Furthermore, by replacing the typeattributeset statement, redundant policies can be eliminated without modifying the base module. In this study, the effectiveness of our method is demonstrated through evaluation of policy elimination and through an attack prevention experiment by incorporating the vulnerabilities in Apache Struts2.

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DOI： 10.1007/978-3-030-58208-1_6

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DOI： 10.1587/transinf.2019ICP0011

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JavaScript code used by web-based attacks is usually protected by some anti-analysis techniques such as obfuscation or cloaking in order to hide its intent or avoid detection. Analyzing such code becomes an urgent task to counter cyber attacks. Therefore, we propose an analysis support system for anti-analysis JavaScript code. The proposed system comprehensively monitors browser API operations and outputs API operation logs for helping analyst's understanding the behavior of code. By using Proxy objects to capture API operations, the proposed system successfuly monitors API operations that could not be captured completely by existing methods. In addition, by replacing variable references, it is able to comprementally monitor API operations for non-replaceable APIs. In this paper, we describe the concept of the proposed system and the implementation of analysis method. We also report the result of analyzing anti-analysis JavaScript codes as an evaluation.

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A specialized operating system (OS) can provide some order-made service efficiently. However, development of the specialized OS takes a large amount of cost (e.g., device driver, file management functions). Thus, it is important to reduce the cost. In this paper, we describe a method for introducing the specialized OS and Linux run independently in multicore processors, and the specialized OS uses Linux file I/O functions. This paper describes the design and the implementation of the proposed method for AnT operating system as the specialized OS, and reports the evaluation results of the proposed method.

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DOI： 10.1109/CANDAR.2019.00012

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DOI： 10.1007/978-3-030-34339-2_5

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DOI： 10.14923/transinfj.2018JDP7035

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DOI： 10.1007/978-3-030-26834-3_14

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1504/IJSSC.2019.100007

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DOI： 10.1007/978-3-319-98530-5_76

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In microkernel operating systems (OSes), some parts of OS functions are implemented as processes, which called OS server. For this reason, OS functions can be distributed by placing OS servers to multiple processors. However, it is difficult to reduce the response time of a processing request from an application program (AP) to an OS server. This is due to invocation of multiple inter server communication for processing requests. In addition, an interface of processing requests from AP to OS servers is blocking in most cases. Hence, a processing request is forced to be done successively even though multiple processing are concurrently executable and related OS servers are independent. In this paper, we propose a batch process request function with blocking interface to request multiple processing to OS servers at one time. We also present evaluation results of basic performance, and distributed processing by the proposed function can reduce the response time for a service consists of multiple processing.

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Most conventional digital forensic methods are designed to target hard disk drives, making them ineffective at detecting in-memory malware. In addition, in order to prevent a target system from changing the evidence on hard disk drives, it is necessary to shut down the system or stop its processing, reducing system availability. In this paper, we propose a live forensic method using process duplication to maintain high system availability. The proposed method duplicates the virtual address space of a target process for investigation, and obtains the relevant evidence from the duplicate. By reducing the occurrence of memory copy in the duplication process, it is possible to detect in-memory malware while retaining system availability. We describe the effectiveness of the proposed method, and furthermore, evaluate and report on the delay time when this method is applied to a periodically executing process.

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DOI： 10.1109/DESEC.2018.8625137

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DOI： 10.1109/CANDARW.2018.00035

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DOI： 10.1109/CANDARW.2018.00080

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.14923/transinfj.2017JDP7061

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DOI： 10.1109/CANDAR.2017.91

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：ACM  

DOI： 10.1145/3167918.3167942

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Information Processing Society of Japan  

DOI： 10.2197/ipsjjip.26.396

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DOI： 10.14923/transinfj.2017SKP0012

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DOI： 10.1587/transinf.2016INL0003

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DOI： 10.1109/AINA.2017.61

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DOI： 10.1109/ICISSEC.2016.7885860

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DOI： 10.1109/CANDAR.2016.89

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DOI： 10.1587/transinf.2016PAP0020

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DOI： 10.1007/978-3-319-46298-1_15

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In order to improve file access performance of the processing that users would like to execute at high priority, it is effective to improve cache hit ratio of I/O buffer. Thus, a directory oriented buffer cache mechanism was proposed. This mechanism divides I/O buffer into two areas, and gives higher caching priority to files in specified directories. However, this mechanism monotonically expands the area used for caching files given higher priority. Therefore, this mechanism declines the performance of the whole computer due to deterioration of cache hit ratio of files not given higher priority. Thus, this paper proposes the dynamic partitioning method based on cache hit ratio. The proposed method divides I/O buffer to maintain high cache hit ratio of files given higher priority and prevent cache hit ratio of the other files from degradation. Additionally, this paper describes the evaluation of effectivity of the proposed method.

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DOI： 10.1007/s11227-016-1671-5

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DOI： 10.1145/2851613.2851744

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DOI： 10.1109/IIAI-AAI.2015.247

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DOI： 10.1109/IIAI-AAI.2015.243

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DOI： 10.2197/ipsjjip.24.781

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DOI： 10.1587/transinf.2015ICF0001

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DOI： 10.1587/transinf.2015PAL0003

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DOI： 10.2197/ipsjjip.23.673

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In recent years, Android malware has been increasing, and countermeasures against them have become an issue. In particular, the leakage of user information by malware has become an important issue. In order to address this problem, we design and implement a method that uses TaintDroid to prevent the leakage of user information from Android device. This method tracks the diffusion of user information in a device and dynamically controls the action of application program (AP) when the leakage of user information is detected. As a result, this method prevents the leakage of user information from the device. In addition, this method obtains the AP name involved in the leakage of user information and understands the diffusion path of user information when APs communicate user information with each other. Therefore, a user can deal with each AP of leakage factors. Furthermore, this method replaces user information that is leaked from a device with a dummy data. As a result, this method prevents the leakage of user information from the device without interfering the process of AP.

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Information Processing Society of Japan  

DOI： 10.2197/ipsjjip.23.664

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Buffer cache is implemented to improve I/O performance with data in disks. As buffer cache management, there are many mechanisms based on access pattern of block. On the other hand, we proposed I/O buffer cache mechanism based on the frequency of file usage (FFU). Our previous proposed mechanism calculates file importance from the information of system-call of the file operation. Then, it controls two level buffer cache based on the file importance. In this paper, we propose a setting method of opportunity of updating file importance on FFU. The proposed method focuses on whether the file state is access intensive or not. This paper also describes a setting method of parameters of the proposed method based on access information of a target system. Finally, this paper reports the evaluation results of the proposed method by using typical access pattern data and real access patterns.

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1587/transinf.2014ICL0001

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DOI： 10.1109/ICMU.2015.7061051

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DOI： 10.1109/CANDAR.2014.36

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DOI： 10.2197/ipsjjip.22.597

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Springer Verlag  

DOI： 10.1007/978-3-319-09843-2_3

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DOI： 10.22667/JISIS.2014.05.31.055

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DOI： 10.1007/978-3-642-41383-4_1

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DOI： 10.1109/HPCC.and.EUC.2013.229

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DOI： 10.1007/s11227-011-0707-0

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Recently, it is more important to grasp and control the damage of attacks safely, so much research has been done to increase the security of the general-purpose OS by observing the behavior using virtualization technology. In this paper, we propose a mechanism to observe and logging the file access in guest OS from virtual machine monitor using the inter-domain communication by the filter driver. Our mechanism can be applied independently of the implementation of virtual machine monitor. By hooking file accesses in the guest OS, log messages are transferred and stored to the virtual machine monitor, so our approach is effective from the viewpoint of preservation of the log. We show the design and implementation of our mechanism for both Xen and KVM. Furthermore, we report the results of measuring the performance when accessing files as evaluation.

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Other Link： http://id.nii.ac.jp/1001/00090264/

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Springer  

DOI： 10.1007/978-94-007-6738-6_31

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DOI： 10.1007/978-94-007-6738-6_30

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DOI： 10.1109/NBiS.2013.57

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The number of incidents leaking of classified information has increased. To prevent leakage of information, it is important for users to understand the usage of classified information. To understand the usage of classified information, an method has implemented that monitors operations on the classified information and logs those operations. However, because an analysis of logs is necessary for understanding the usage of classified information, it is difficult to prevent leakage of classified information. We proposed the function to trace the classified information diffusion and detect a leakage of classified information. However, to understand the usage of classified information from the function by users, it is necessary to analyze the log in text format. Therefore, it takes long time to investigate the cause of the leakage of information. This paper proposes a function to visualize diffusion path of classified information. The function enables us to visualize the diffusion path of designated files that contain classified information. In addition, the function can visualize the diffusion paths focusing on the designated period of file operations. This paper also describes the implementation of the proposed function by extending the existing tracing function of classified information.

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Logging information is necessary in order to understand a computer's behavior. However, there is a possibility that attackers will delete logs to hide the evidence of their attacking and cheating. Moreover, various problems might cause the loss of logging information. To address these issues, we propose a system to prevent tampering and loss of logging information using a virtual machine monitor (VMM). In this system, logging information generated by the operating system (OS) and application program (AP) working on the target virtual machine (VM) is gathered by the VMM without any modification of the kernel source codes. The security of the logging information is ensured by its isolation from the VM. In addition, the isolation and multiple copying of logs can help in the detection of tampering.

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/NBiS.2012.79

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Using the Bayesian filter is a popular approach to distinguish between spam and legitimate e-mails. Spam senders sometimes modify emails to bypass the Bayesian filter. The tokens included in the e-mail are investigated for improving the accuracy of classification of emails. The results show that tokens found at the first time sometimes degrade the accuracy of the classification. In this paper, we propose an anti-spam method that consider the difference of the property of tokens. The proposed method limits the use of tokens for improvement of Bayesian filter. The evaluations were performed by using some email sets. The results shows that the proposed method can decrease the false negative rate.

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Other Link： http://id.nii.ac.jp/1001/00077500/

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In some projects, secure OSes for Linux have been developed and different implementations have been adopted. However, there is no report on evaluation of performance of secure OS that after Linux 2.6.19 in detail, and the relationship between the kernel version and the performance is not clear. Therefore, we evaluate change of the performance at the version interval and overhead of three secure OSes (SELinux, TOMOYO Linux, LIDS), by using the overhead measurement tool, the LSM Performance Monitor (LSMPMON) developed for Linux 2.6.30. This paper shows the performance of secure OSes on Linux 2.6.30.

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1007/978-3-642-23300-5_14

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DOI： 10.1007/978-3-642-17610-4_7

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Buffer cache is implemented to improve I/O performance with data in disks. As buffer cache management, there are many mechanisms, but still many operating systems deploy LRU (Least Recently Used) algorithm. On the other hand, to reflect process contents of application programs to buffer cache, management scheme based on the system calls which application programs requested is better. Then, we propose I/O buffer cache mechanism based on the frequency of system call of the file operation. Our proposed mechanism calculates file importance from information of file operation. In addition in buffer cache blocks are replaced based on this file importance. In this paper, we describe our mechanism improves I/O performance by evaluation of application programs.

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DOI： 10.1007/978-3-642-17610-4_10

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Information Processing Society of Japan  

DOI： 10.2197/ipsjjip.18.201

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DOI： 10.4156/jnit.vol1.issue3.9

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DOI： 10.1007/978-3-642-17569-5_54

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In personal computer environment, it is important to protect the information leakage. In this paper, a mechanism of protecting information leakage is proposed. This mechanism has two functions. One function is the function of tracing classified information. The other function is the function of controlling the write function. The tracing function is deployed by hook the call of file operations, interprocess communication, and process creation. This paper describes a method that improve the accuracy of tracing classified information and reduce the labor of configuration. This paper shows the proposed mechanism can trace all files and improve the the accuracy of tracing classified information by using the user judgement.

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In recent years, with the spread of the Internet, the increase in the number of spam has become one of the most serious problems. A recent report reveals that 91% of all e-mail exchanged in 2006 was spam. Using the Bayesian filter is a popular approach to distinguish between spam and legitimate e-mails. It applies the Bayes theory to identify spam. This filter proffers high filtering precision and is capable of detecting spam as per personal preferences. However, the number of image spam, which contains the spam message as an image, has been increasing rapidly. The Bayesian filter is not capable of distinguishing between image spam and legitimate e-mails since it learns from and examines only text data. Therefore, in this study, we propose an anti-image spam technique that uses image information such as file size. This technique can be easily implemented on the existing Bayesian filter. In addition, we report the results of the evaluations of this technique.

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Other Link： http://id.nii.ac.jp/1001/00009442/

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DOI： 10.1109/ISA.2008.84

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DOI： 10.1109/AINA.2006.94

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DOI： 10.1007/11893004_94

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Language：Japanese   Publisher：Information Processing Society of Japan (IPSJ)  

Statistical filtering using Bayes theory, called Bayesian filtering, is studied for years, and after Graham published an essay "A plan for spam", many implementations of Bayesian filtering have developed. In multi-lingual email environment, which more than one language is used in incoming email, corpus for statistical filtering is usually separated into ones specified to each language. In this paper, we propose a new method in which a corpus is chosen for each token, and then we show the efficiency of our proposed method by experiments in comparison to traditional methods.

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Other Link： http://id.nii.ac.jp/1001/00010556/

Language：Japanese   Publisher：Information Processing Society of Japan (IPSJ)  

Embedding personal identifiers as watermarks to software is effective in order to protect copyright of them. Monden et al. proposed program watermarking scheme for embedding arbiter character sequence to target Java class files. But their scheme can be used to embed only the same watermarking to all the programs. Thus, if we apply their scheme to embed users' personal identifiers, the watermark can be specified by comparing two or more users' program. This paper improve the problem by using a class structure transformation.

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Other Link： http://id.nii.ac.jp/1001/00010564/

Language：Japanese   Publisher：Information Processing Society of Japan (IPSJ)  

In order to prevent attacks exploiting buffer overflow vulnerabilities, there are many researches of checking programs for abnormal behaviors based on history of system calls emitted by them. In this paper, the authors take into account control flow of the programs, and prove an efficiency of a method for modeling history of system calls in a Bayesian Network. We also consider a method for appropriate anomaly detection without false positives.

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Other Link： http://id.nii.ac.jp/1001/00010557/

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SELinux Policy Editor is a configuration tool for SELinux. As a part of its support of configuration, this tool simplifies the configuration of SELinux by integrating configuration items. However, the integration of configuration items may harm the fine-grained access control of SELinux. In this paper, we examine the effects of the simplification on access control policy and report the evaluation of the security about Apache web server.

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Other Link： http://id.nii.ac.jp/1001/00010661/

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DOI： 10.1007/978-3-540-31815-6_8

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Some anti-spam schemes are based on challenge-response, a principle that a recipient reads only messages from senders who are registered by the recipient. In these schemes, request for setup is sent to senders who are not registered. Since bounce messages are legitimate but MTA cannot reply to request, we should have some exception to receive for them. However, spammers can abuse this exception to send spam to users, disguising their spam with bounce messages. In this paper, we propose an improved scheme, combining challenge-response and Bayesian filtering, then perform some tests on the effect of our scheme to avoid those spam.

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Operating system controls a process to execute a program. A process is created for executing a program. Then the process is deleted when the program terminated. Processing of process creation needs creation of virtual address space and a read of program. The load of the processing is heavy. Therefore there are many researches for fast process creation. We proposed fast process creation mechanism by recycling process elements. Fast process creation and fast process deletion are realized by recycling process elements. However, reserved process elements consume memory resources. Therefore efficient resource management is necessary. This paper proposes efficient resource management for recycling process elements.

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An operating system controls many processes to execute programs. The processing of process creation and process termination has a heavy load in an operating system. Therefore there are many techniques that can speed up process creation ; for example, sticky bit and the vfork system call are realized in UNIX. Furthermore, demand paging and copy-on-write are realized. Generally, specific programs are often executed repeatedly. For example, in the "make" command of UNIX, process creation and process termination are repeated, because a compiler is executed many times. We propose the function for restarting a process. The function is effective where specific programs are executed repeatedly, because the function can reduce the overhead of process creation and process termination. This paper describes the structure of a process and the function for restarting a process. This paper also reports the performance of the function.

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