The Experts below are selected from a list of 39360 Experts worldwide ranked by ideXlab platform
Dileesh Jostin - One of the best experts on this subject based on the ideXlab platform.
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transparent encryption for External Storage media with key management adapted to mobile use
Annual Computer Security Applications Conference, 2009Co-Authors: Alf Zugenmaier, Sven Lachmund, Dileesh JostinAbstract:External Storage devices, such as USB-Sticks, SD-Cards, or other flash memory devices, are widely used today. These devices may pose a threat if they contain sensitive data and are then lost or forgotten somewhere. Usability of existing encryption solutions for such External Storage media is limited because of the need to reenter keys or authentication credentials every time the media is plugged to a different device. We present a solution to the usability problem by caching the key with time delayed deletion. We implemented two variations of this concept. One solution does not require any explicit user interaction, thus limiting the use of the External Storage device to short term data transfer, only. The second solution allows multiple encryption keys for different files of the file system to be managed on a trusted host, using the timed key caching to avoid handing out keys or passwords.
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ACSAC - Transparent Encryption for External Storage Media with Key Management Adapted to Mobile Use
2009 Annual Computer Security Applications Conference, 2009Co-Authors: Alf Zugenmaier, Sven Lachmund, Dileesh JostinAbstract:External Storage devices, such as USB-Sticks, SD-Cards, or other flash memory devices, are widely used today. These devices may pose a threat if they contain sensitive data and are then lost or forgotten somewhere. Usability of existing encryption solutions for such External Storage media is limited because of the need to reenter keys or authentication credentials every time the media is plugged to a different device. We present a solution to the usability problem by caching the key with time delayed deletion. We implemented two variations of this concept. One solution does not require any explicit user interaction, thus limiting the use of the External Storage device to short term data transfer, only. The second solution allows multiple encryption keys for different files of the file system to be managed on a trusted host, using the timed key caching to avoid handing out keys or passwords.
Ivan Lopez-arevalo - One of the best experts on this subject based on the ideXlab platform.
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DCNET/OPTICS - Adaptive File Transfer Middleware for mobile applications
2010Co-Authors: Mario A. Gomez-rodriguez, Victor J. Sosa-sosa, Ivan Lopez-arevaloAbstract:Current mobile devices such as mobile phones and PDAs are able to run applications that can demand a considerable Storage space. When these devices run out of local memory, they require backing up their files in an External Storage device, which could restrict the user mobility. This paper presents an Adaptive File Transfer Middleware (AFTM) for mobile applications. This middleware eases the transfer of files between a mobile device and an External Storage server by accessing the best wireless connection (WiFi, GPRS/UMTS) available, considering quality and cost of the service. AFTM is also able to use the Multimedia Messaging Service (MMS) as another option for transferring files. A File Backup Service (FBS) was built on top of the AFTM. The FBS will detect when the device ran out of local memory and will automatically send selected files from the mobile device to an External Storage server, freeing the mobile Storage memory. To decide which files should be backed up, FBS implements several file replacement policies. Results showed that the selection of one replacement policy will be a trade-off between the efficiency of the algorithm and the cost of the wireless service available when a file needs to be backed up.
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SNPD - An External Storage Support for Mobile Applications with Scare Resources
2010 11th ACIS International Conference on Software Engineering Artificial Intelligence Networking and Parallel Distributed Computing, 2010Co-Authors: Mario A. Gomez-rodriguez, Victor J. Sosa-sosa, Ivan Lopez-arevaloAbstract:Nowadays, users of mobile phones generate too many files that have to be frequently downloaded to an External Storage repository, restricting the user mobility. This paper presents a File Transfer Service (FTS) for mobile phones with scare Storage resources. It is a support that can be used through a set of functions (API) that facilitates file transfer between mobile applications and External Storage servers, taking advantage of different wireless networks. The FTS selects the best wireless connection (WiFi, GPRS or UMTS) considering accessibility and cost of the service. FTS is able to use the Multimedia Messaging Service (MMS) as an alternative option for transferring files, which is especially useful when the mobile phone connectivity is limited. It is based on the J2ME platform. As a use case, a mobile application named Swapper was built on top of the FTS. When the mobile phone memory runs out, Swapper automatically sends selected files to a web Storage server using the best connection available, increasing the Storage space in the mobile phone. Swapper includes an efficient replacement policy that minimizes the latency perceived by users.
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ANCS - External Storage middleware for wireless devices with limited resources
Proceedings of the 5th ACM IEEE Symposium on Architectures for Networking and Communications Systems - ANCS '09, 2009Co-Authors: Mario A. Gomez-rodriguez, Victor J. Sosa-sosa, Ivan Lopez-arevaloAbstract:This paper introduces an External Storage middleware, that offers a set of functions (API - Application Program Interface) to mobile applications and facilitates the transfer of files between a mobile device and External Storage servers regardless of the available wireless network. The Middleware selects the best wireless service available. In addition, the files exchanged between the mobile device and the External Storage server are encrypted to provide security when traveling through the network. As a use case, it was developed an automatic file swapper service for mobile devices. The service is running on the mobile device optimizing its available Storage space. Our middleware was tested with the following wireless services: Wi-Fi, GPRS, MMS.
Alf Zugenmaier - One of the best experts on this subject based on the ideXlab platform.
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transparent encryption for External Storage media with key management adapted to mobile use
Annual Computer Security Applications Conference, 2009Co-Authors: Alf Zugenmaier, Sven Lachmund, Dileesh JostinAbstract:External Storage devices, such as USB-Sticks, SD-Cards, or other flash memory devices, are widely used today. These devices may pose a threat if they contain sensitive data and are then lost or forgotten somewhere. Usability of existing encryption solutions for such External Storage media is limited because of the need to reenter keys or authentication credentials every time the media is plugged to a different device. We present a solution to the usability problem by caching the key with time delayed deletion. We implemented two variations of this concept. One solution does not require any explicit user interaction, thus limiting the use of the External Storage device to short term data transfer, only. The second solution allows multiple encryption keys for different files of the file system to be managed on a trusted host, using the timed key caching to avoid handing out keys or passwords.
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ACSAC - Transparent Encryption for External Storage Media with Key Management Adapted to Mobile Use
2009 Annual Computer Security Applications Conference, 2009Co-Authors: Alf Zugenmaier, Sven Lachmund, Dileesh JostinAbstract:External Storage devices, such as USB-Sticks, SD-Cards, or other flash memory devices, are widely used today. These devices may pose a threat if they contain sensitive data and are then lost or forgotten somewhere. Usability of existing encryption solutions for such External Storage media is limited because of the need to reenter keys or authentication credentials every time the media is plugged to a different device. We present a solution to the usability problem by caching the key with time delayed deletion. We implemented two variations of this concept. One solution does not require any explicit user interaction, thus limiting the use of the External Storage device to short term data transfer, only. The second solution allows multiple encryption keys for different files of the file system to be managed on a trusted host, using the timed key caching to avoid handing out keys or passwords.
Mario A. Gomez-rodriguez - One of the best experts on this subject based on the ideXlab platform.
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DCNET/OPTICS - Adaptive File Transfer Middleware for mobile applications
2010Co-Authors: Mario A. Gomez-rodriguez, Victor J. Sosa-sosa, Ivan Lopez-arevaloAbstract:Current mobile devices such as mobile phones and PDAs are able to run applications that can demand a considerable Storage space. When these devices run out of local memory, they require backing up their files in an External Storage device, which could restrict the user mobility. This paper presents an Adaptive File Transfer Middleware (AFTM) for mobile applications. This middleware eases the transfer of files between a mobile device and an External Storage server by accessing the best wireless connection (WiFi, GPRS/UMTS) available, considering quality and cost of the service. AFTM is also able to use the Multimedia Messaging Service (MMS) as another option for transferring files. A File Backup Service (FBS) was built on top of the AFTM. The FBS will detect when the device ran out of local memory and will automatically send selected files from the mobile device to an External Storage server, freeing the mobile Storage memory. To decide which files should be backed up, FBS implements several file replacement policies. Results showed that the selection of one replacement policy will be a trade-off between the efficiency of the algorithm and the cost of the wireless service available when a file needs to be backed up.
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SNPD - An External Storage Support for Mobile Applications with Scare Resources
2010 11th ACIS International Conference on Software Engineering Artificial Intelligence Networking and Parallel Distributed Computing, 2010Co-Authors: Mario A. Gomez-rodriguez, Victor J. Sosa-sosa, Ivan Lopez-arevaloAbstract:Nowadays, users of mobile phones generate too many files that have to be frequently downloaded to an External Storage repository, restricting the user mobility. This paper presents a File Transfer Service (FTS) for mobile phones with scare Storage resources. It is a support that can be used through a set of functions (API) that facilitates file transfer between mobile applications and External Storage servers, taking advantage of different wireless networks. The FTS selects the best wireless connection (WiFi, GPRS or UMTS) considering accessibility and cost of the service. FTS is able to use the Multimedia Messaging Service (MMS) as an alternative option for transferring files, which is especially useful when the mobile phone connectivity is limited. It is based on the J2ME platform. As a use case, a mobile application named Swapper was built on top of the FTS. When the mobile phone memory runs out, Swapper automatically sends selected files to a web Storage server using the best connection available, increasing the Storage space in the mobile phone. Swapper includes an efficient replacement policy that minimizes the latency perceived by users.
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ANCS - External Storage middleware for wireless devices with limited resources
Proceedings of the 5th ACM IEEE Symposium on Architectures for Networking and Communications Systems - ANCS '09, 2009Co-Authors: Mario A. Gomez-rodriguez, Victor J. Sosa-sosa, Ivan Lopez-arevaloAbstract:This paper introduces an External Storage middleware, that offers a set of functions (API - Application Program Interface) to mobile applications and facilitates the transfer of files between a mobile device and External Storage servers regardless of the available wireless network. The Middleware selects the best wireless service available. In addition, the files exchanged between the mobile device and the External Storage server are encrypted to provide security when traveling through the network. As a use case, it was developed an automatic file swapper service for mobile devices. The service is running on the mobile device optimizing its available Storage space. Our middleware was tested with the following wireless services: Wi-Fi, GPRS, MMS.
Lars Arge - One of the best experts on this subject based on the ideXlab platform.
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External memory data structures
Massive Computing, 2002Co-Authors: Lars ArgeAbstract:In many massive dataset applications the data must be stored in space and query efficient data structures on External Storage devices. Often the data needs to be changed dynamically. In this chapter we discuss recent advances in the development of provably worst-case efficient External memory dynamic data structures. We also briefly discuss some of the most popular External data structures used in practice.
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External-Storage Data Structures for Plane-Sweep Algorithms
BRICS Report Series, 1994Co-Authors: Lars ArgeAbstract:In this paper we develop a technique for transforming an internal memory datastructure into an External Storage data structure suitable for plane-sweep algorithms. We use this technique to develop External Storage versions of the range tree and the segment tree. We also obtain an External priority queue. Using the first two structures, we solve the orthogonal segment intersection, the isothetic rectangle intersection, and the batched range searching problem in the optimal number of I/O-operations. Unlike previously known I/O-algorithms the developed algorithms are straightforward generalizations of the ordinary internal memory plane-sweep algorithms. Previously almost no dynamic data structures were known for the model we are working in.
