Kalman Graffi - 5 Slides Demo - 2008
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The document proposes a system management framework using an information management system to allow peer-to-peer networks to self-optimize. The information management system would gather statistics across different layers and modules. It would analyze the statistics to identify correlations and propose optimized parameter settings. This would allow the system to find appropriate peers according to their capacities and derive settings to improve quality of service and efficiency.
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IEEE LCN 2007: Kalman Graffi - Overlay Bandwidth Management: Scheduling and A...
Peer-to-peer and mobile networks gained significant attention of both research community and industry. Applying the peer-to-peer paradigm in mobile networks lead to several problems regarding the bandwidth demand of peer-to-peer networks. Time-critical messages are delayed and delivered unacceptably slow. In addition to this, scarce bandwidth is wasted on messages of less priority. Therefore, the focus of this paper is on bandwidth management issues at the overlay layer and how they can be solved. We present HiPNOS.KOM, a priority based scheduling and active queue management system. It guarantees better QoS for higher prioritized messages in upper network layers of peer-to-peer systems. Evaluation using the peer-to-peer simulator PeerfactSim.KOM shows that HiPNOS.KOM brings significant improvement in Kademlia in comparison to FIFO and Drop-Tail, strategies that are used nowadays on each peer. User initiated lookups have in Kademlia 24% smaller operation duration when using HiPNOS.KOM.
Kalman Graffi - Monitoring and Management of P2P Systems - 2010
This is the long presentation of the contributions made in the dissertation of Dr.-Ing. Kalman Graffi - Monitoring and Management of P2P Systems. The talk was given at 29. Sept. 2009 in Madrid / Spain.
ACM NOTERE 2008 - Kalman Graffi - From Cells to Organisms - Long-Term Guarant...
The peer-to-peer paradigm gained more and more impact in the last years. The reason for P2P arising now is related to the continuous development of device capabilities in the last years, like CPU power, storage space and bandwidth. However, the demand for services and resources is permanently increasing, although the peers have a variety of other resources themselves. In this paper we present the idea of a P2P system acting as a service provider using the resources of participating peers and stating guarantees on the quality of the service it provides. In order to fulfill these service level agreements, the peers confederate to a distributed supervisor of peer resources (P2PCLOUD), monitoring the network, predicting trends on resource availabilities and deciding on resource allocation strategies. This paper discusses the challenges and a solution draft of the concept of P2PCLOUD.
IEEE ICPADS 2008 - Kalman Graffi - SkyEye.KOM: An Information Management Over...
In order to ease the development and maintenance of more complex P2P applications, which combine multiple P2P functionality (e.g. streaming and dependable storage), we suggest to extend structured P2P systems with a dedicated information management layer. This layer is meant to generate statistics on the whole P2P system and to enable capacity-based peer search, which helps the individual functionality layers in the P2P application to find suitable peers for layer-specific role assignment. We present in this paper SkyEye.KOM, an information management layer applicable on DHTs, which fulfills these desired functionality. SkyEye.KOM builds an over-overlay, which is scalable by leveraging the underlying DHT, easy to deploy as simple add-on to existing DHTs and efficient as it needs O(log N) hops per query and to place peer-specific information network wide accessible. Evaluation shows that SkyEye.KOM has a good query performance and that the costs for maintaining the over-overlay are very low.
IEEE P2P 2013 - Bootstrapping Skynet: Calibration and Autonomic Self-Control ...
Timo Klerx and Kalman Graffi. Bootstrapping Skynet: Calibration and Autonomic Self-Control of Structured Peer-to-Peer Networks. In IEEE P2P ’13: Proceedings of the International Conference on Peer-to-Peer Computing, 2013.
Abstract—Peer-to-peer systems scale to millions of nodes and provide routing and storage functions with best effort quality. In order to provide a guaranteed quality of the overlay functions, even under strong dynamics in the network with regard to peer capacities, online participation and usage patterns, we propose to calibrate the peer-to-peer overlay and to autonomously learn which qualities can be reached. For that, we simulate the peer- to-peer overlay systematically under a wide range of parameter configurations and use neural networks to learn the effects of the configurations on the quality metrics. Thus, by choosing a specific quality setting by the overlay operator, the network can tune itself to the learned parameter configurations that lead to the desired quality. Evaluation shows that the presented self-calibration succeeds in learning the configuration-quality interdependencies and that peer-to-peer systems can learn and adapt their behavior according to desired quality goals.
Recommended
IEEE LCN 2007: Kalman Graffi - Overlay Bandwidth Management: Scheduling and A...
Peer-to-peer and mobile networks gained significant attention of both research community and industry. Applying the peer-to-peer paradigm in mobile networks lead to several problems regarding the bandwidth demand of peer-to-peer networks. Time-critical messages are delayed and delivered unacceptably slow. In addition to this, scarce bandwidth is wasted on messages of less priority. Therefore, the focus of this paper is on bandwidth management issues at the overlay layer and how they can be solved. We present HiPNOS.KOM, a priority based scheduling and active queue management system. It guarantees better QoS for higher prioritized messages in upper network layers of peer-to-peer systems. Evaluation using the peer-to-peer simulator PeerfactSim.KOM shows that HiPNOS.KOM brings significant improvement in Kademlia in comparison to FIFO and Drop-Tail, strategies that are used nowadays on each peer. User initiated lookups have in Kademlia 24% smaller operation duration when using HiPNOS.KOM.
Kalman Graffi - Monitoring and Management of P2P Systems - 2010
This is the long presentation of the contributions made in the dissertation of Dr.-Ing. Kalman Graffi - Monitoring and Management of P2P Systems. The talk was given at 29. Sept. 2009 in Madrid / Spain.
ACM NOTERE 2008 - Kalman Graffi - From Cells to Organisms - Long-Term Guarant...
The peer-to-peer paradigm gained more and more impact in the last years. The reason for P2P arising now is related to the continuous development of device capabilities in the last years, like CPU power, storage space and bandwidth. However, the demand for services and resources is permanently increasing, although the peers have a variety of other resources themselves. In this paper we present the idea of a P2P system acting as a service provider using the resources of participating peers and stating guarantees on the quality of the service it provides. In order to fulfill these service level agreements, the peers confederate to a distributed supervisor of peer resources (P2PCLOUD), monitoring the network, predicting trends on resource availabilities and deciding on resource allocation strategies. This paper discusses the challenges and a solution draft of the concept of P2PCLOUD.
IEEE ICPADS 2008 - Kalman Graffi - SkyEye.KOM: An Information Management Over...
In order to ease the development and maintenance of more complex P2P applications, which combine multiple P2P functionality (e.g. streaming and dependable storage), we suggest to extend structured P2P systems with a dedicated information management layer. This layer is meant to generate statistics on the whole P2P system and to enable capacity-based peer search, which helps the individual functionality layers in the P2P application to find suitable peers for layer-specific role assignment. We present in this paper SkyEye.KOM, an information management layer applicable on DHTs, which fulfills these desired functionality. SkyEye.KOM builds an over-overlay, which is scalable by leveraging the underlying DHT, easy to deploy as simple add-on to existing DHTs and efficient as it needs O(log N) hops per query and to place peer-specific information network wide accessible. Evaluation shows that SkyEye.KOM has a good query performance and that the costs for maintaining the over-overlay are very low.
IEEE P2P 2013 - Bootstrapping Skynet: Calibration and Autonomic Self-Control ...
Timo Klerx and Kalman Graffi. Bootstrapping Skynet: Calibration and Autonomic Self-Control of Structured Peer-to-Peer Networks. In IEEE P2P ’13: Proceedings of the International Conference on Peer-to-Peer Computing, 2013.
Abstract—Peer-to-peer systems scale to millions of nodes and provide routing and storage functions with best effort quality. In order to provide a guaranteed quality of the overlay functions, even under strong dynamics in the network with regard to peer capacities, online participation and usage patterns, we propose to calibrate the peer-to-peer overlay and to autonomously learn which qualities can be reached. For that, we simulate the peer- to-peer overlay systematically under a wide range of parameter configurations and use neural networks to learn the effects of the configurations on the quality metrics. Thus, by choosing a specific quality setting by the overlay operator, the network can tune itself to the learned parameter configurations that lead to the desired quality. Evaluation shows that the presented self-calibration succeeds in learning the configuration-quality interdependencies and that peer-to-peer systems can learn and adapt their behavior according to desired quality goals.
Kalman Graffi - Disputation Talk - Monitoring and Management of P2P Systems -...
This is the disputation talk fo Dr.-Ing. Kalman Graffi - Monitoring and Management of P2P Systems
Claremont Report on Database Research: Research Directions (Beng Chin Ooi)
This is a set of slides from the Claremont Report on Database Research, see http://db.cs.berkeley.edu/claremont/ for more details. These particular slides are from a "Research Directions" talk by "Beng Chin Ooi." (Uploaded for discussion at the Stanford InfoBlog, http://infoblog.stanford.edu/.)
Agata overview
Agata provides high speed cyber solutions including a full featured Forensics suite with Meta Data and tens of thousands of dynamic policy rules, Layer-7 Intelligence, Network Analytics, filtered sessions and traffic recording.
Backed by 20 years of specialized research and development of traffic management and security solutions for top tier customers, Agata is able to provide best in class high-end technological products. Agata appliances allow enterprises to secure networks using state of the art cyber solutions. Agata DPI empowers the user to find, record, analyze and track security events and vulnerabilities including Zero-Day exploits.
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Privacy Preserved Distributed Data Sharing with Load Balancing Scheme
Data sharing services are provided under the Peer to Peer (P2P) environment. Federated
database technology is used to manage locally stored data with a federated DBMS and provide unified
data access. Information brokering systems (IBSs) are used to connect large-scale loosely federated data
sources via a brokering overlay. Information brokers redirect the client queries to the requested data
servers. Privacy preserving methods are used to protect the data location and data consumer. Brokers are
trusted to adopt server-side access control for data confidentiality. Query and access control rules are
maintained with shared data details under metadata. A Semantic-aware index mechanism is applied to
route the queries based on their content and allow users to submit queries without data or server
information.
Distributed data sharing is managed with Privacy Preserved Information Brokering (PPIB)
scheme. Attribute-correlation attack and inference attacks are handled by the PPIB. PPIB overlay
infrastructure consisting of two types of brokering components, brokers and coordinators. The brokers
acts as mix anonymizer are responsible for user authentication and query forwarding. The coordinators
concatenated in a tree structure, enforce access control and query routing based on the automata.
Automata segmentation and query segment encryption schemes are used in the Privacy-preserving
Query Brokering (QBroker). Automaton segmentation scheme is used to logically divide the global
automaton into multiple independent segments. The query segment encryption scheme consists of the
preencryption and postencryption modules.
The PPIB scheme is enhanced to support dynamic site distribution and load balancing
mechanism. Peer workloads and trust level of each peer are integrated with the site distribution process.
The PPIB is improved to adopt self reconfigurable mechanism. Automated decision support system for
administrators is included in the PPIB.
LifeSocial - A P2P-Platform for Secure Online Social Networks
This is a summary presentation of Dr.-Ing. Kalman Graffi on LifeSocial - the P2P-Platform for Secure Online Social Networks
Case Study—PART 1—Jurisdictional Declaration CriteriaLevels .docx
Case Study—PART 1—Jurisdictional Declaration
Criteria
Levels of Achievement
Content
(70%)
Advanced
92-100%
Proficient
84-91%
Developing
1-83%
Not Present
Total
Economic Development Location
18.5 to 20 points:
Location is clearly delineated, fully meeting assignment standards.
16.5 to 18 points:
Meets most of the assignment standards.
1 to 16 points:
Location needs further specification before the student may proceed.
0 points
Not present
Action Research Statement of Work Understood and Signed
13.5 to 15 points:
Template completed.
12.5 to 13 points:
Template partially completed.
1 to 12 points:
Student Modified Template
0 points
Not present
Structure (30%)
Advanced
92-100%
Proficient
84-91%
Developing
1-83%
Not present
Total
Formatting, Spelling, and Grammar
13.5 to 15 points:
No spelling or grammar errors
12.5 to 13 points:
1-2 spelling and/or
grammar errors
1 to 12 points:
3-4 spelling and/or
grammar errors
0 points
Not present
Professor Comments:
Total:
/50
Running head: NETWORK DESCRIPTION 1
NETWORK DESCRIPTION 6
NETWORK DESCRIPTION
Institution Affiliation
Student Name
Date
HEALTH-COP COMPANY
Network and Workflow Description
Data mining is a complex process that involves several activities undertaken sequentially for the entire process to be successful. As such, there are specific protocols that must be followed in data mining. The desired goals and objectives are the guiding principles upon which the type of data to be analyzed is identified. The main goal for Health-Cop is to establish links between diet composition and health issues. More specifically, the company will focus on analysis of data from various health facilities, websites, databases and health journals. The analysis is intended to provide new forms of data that can be interpreted to give meaningful patterns. To facilitate the process of data mining, there are several aspects that must be considered such as: statistics, clustering of data, rules of association, data classification, visualization and the decision tree.
Network Description
Health Cop company will set up is network system using both the windows and Linux based operating system. The company will have 10 desktop computers and 5 portable computers. The 10 desktop computers will be connected together via a metered Wi-Fi service. The desktops will be the main engine of the company. All the desktops will be configured with an algorithm that constantly searches for specific keywords from various databases. The portables computers will be connected to the internet via modems. A modem is much safer since it limits the connectivity to only the device being used. Internet connectivity via modem is facilitated through local area networks (LAN), through to the service providers, (Cui, et.al., 2016). Multiple firewalls are set up within the company networks to sort out undesired data traffic from the local network on the computer devices.
The most suitable firewall for the network w ...
Peer Sim & P2P
Brief description on P2P networks and then some slides about PeerSim simulation on Max Min observer functions.
Network Planning & Design: An Art or a Science?
With the rapid growth of IP networks in South-Asia in the past
few years, and the advent of new services and applications -- be they
wireless/wireline broadband Internet access, cable telephony, VoIP, remote
teleconferencing, e-governance, or mobile entertainment -- a key
issue before carriers is how to design and operate their networks as
methodically and as efficiently as possible to maximize both customer
retention and profits.
While several best practices typically emerge from each provider\'s
unique situation and cumulative experience (the "art" of network design), there
are certain operational precepts that systematize and streamline the
complex, multi-dimensional task of designing and managing modern, operational
IP networks (the "science" of network design).
In this talk, we first discuss the overall network design process and the
manner in which control over the network must be exercised at varying
timescales to achieve efficient operation. Next we discuss the
functions that the operational, engineering, and planning teams at a
carrier must typically execute, their inter-relationships, and
the importance/rationale for performing them to optimize network
performance.
We then outline some network design best practices that have evolved
over the past decade, drawing upon examples of carriers such as
Sprint, Global Crossing, AT&T, NTT, and Reliance. We conclude with
a look at some automated traffic engineering and planning tools,
and how they enable carriers to rapidly identify potential
performance problems, rigorously experiment with/evaluate design
options, perform thorough scenario and network analysis, and
develop robust designs.
Security Delivery Platform: Best practices
Security Delivery Platform: Best practices
The traditional Security model was one that operated under simple assumptions. Those assumptions led to deployment models which in todays’ world of cyber security have been proven to be quite vulnerable and inadequate to growing amount and diversity of threats.
A Security Delivery Platform addresses the above considerations and provides a powerful solution for deploying a diverse set of security solutions, as well as scaling each security solution beyond traditional deployments. Such platform delivers visibility into the lateral movement of malware, accelerate the detection of ex-filtration activity, and could significantly reduce the overhead, complexity and costs associated with such security deployments.
In today’s world of industrialized and well-organized cyber threats, it is no longer sufficient to focus on the security applications exclusively. Focusing on how those solutions get deployed together and how they get consistent access to relevant data is a critical piece of the solution. A Security Delivery Platform in this sense is a foundational building block of any cyber security strategy.
Analytics for automating critical infrastructures
At OFC 2023, Achim Autenrieth outlined the way forward for critical infrastructure automation, exploring SDN, streaming telemetry, network analytics and AI/ML.
IEEE CCNC 2011: Kalman Graffi - LifeSocial.KOM: A Secure and P2P-based Soluti...
The phenomenon of online social networks reaches millions of users in the Internet nowadays. In these, users present themselves, their interests and their social links which they use to interact with other users. We present in this paper LifeSocial.KOM, a p2p-based platform for secure online social networks which provides the functionality of common online social networks in a totally distributed and secure manner. It is plugin-based, thus extendible in its functionality, providing secure communication and access-controlled storage as well as monitored quality of service, addressing the needs of both, users and system providers. The platform operates solely on the resources of the users, eliminating the concentration of crucial operational costs for one provider. In a testbed evaluation, we show the feasibility of the approach and point out the potential of the p2p paradigm in the field of online social networks.
International Journal of Database Management Systems (IJDBMS)
International Journal of Database Management Systems (IJDBMS) is a bi monthly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the database management systems & its applications. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on understanding Modern developments in this field, and establishing new collaborations in these areas.Authors are solicited to contribute to the journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the areas of Database management systems.
Ijdbms
International Journal of Database Management Systems (IJDBMS) is a bi monthly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the database management systems & its applications. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on understanding Modern developments in this field, and establishing new collaborations in these areas.Authors are solicited to contribute to the journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the areas of Database management systems.
IEEE CRS 2014 - Secure Distributed Data Structures for Peer-to-Peer-based Soc...
Jens Janiuk, Alexander Mäcker, Kalman Graffi -
Secure Distributed Data Structures for Peer-to-Peer-based Social Networks
In IEEE CTS ’14: Proceedings of the IEEE International Conference on Collaboration Technologies and Systems, 2014.
Abstract—Online social networks are attracting billions of nowadays, both on a global scale as well as in social enter- prise networks. Using distributed hash tables and peer-to-peer technology allows online social networks to be operated securely and efficiently only by using the resources of the user devices, thus alleviating censorship or data misuse by a single network operator. In this paper, we address the challenges that arise in implementing reliably and conveniently to use distributed data structures, such as lists or sets, in such a distributed hash-table- based online social network. We present a secure, distributed list data structure that manages the list entries in several buckets in the distributed hash table. The list entries are authenticated, integrity is maintained and access control for single users and also groups is integrated. The approach for secure distributed lists is also applied for prefix trees and sets, and implemented and evaluated in a peer-to-peer framework for social networks. Evaluation shows that the distributed data structure is convenient and efficient to use and that the requirements on security hold.
LibreSocial - P2P Framework for Social Networks - Overview
Digital social networks promise to activate the social participants and to support them in their interactivity patterns. Private relationships evolve to friendships, professional contacts define competence networks and political opinions emerge to revolutionary trends. Social networks often act as driving force to intensify the social and global relationships.
In future, using the „Peer-to-Peer Framework for Social Networks“ everybody may host easily and out-of-the-box his personal online social network, without operating costs and without security risks. The framework offers a large set of interactive apps, which can be are freely combinable and technically limitless in their applicability.
The operating costs for such a social network are a revolutionary: no expenses arise. Whether a network for 10 users or for a global network of Millions of users, one aspect is common: due to the peer-to-peer technology used, no expenses arise. Researchers led by Dr.-Ing. Kalman Graffi at the University of Paderborn combined in the framework the advantages of decentralized peer-to-peer applications, of an app market as well as the cloud principle.
The social network is maintained in a peer-to-peer fashion through the computational power of the users’ devices, expensive servers are not needed. Still the availability, retrievability and security of the users‘ data are guaranteed. Each user keeps total control on the access control rights of his data. Similar to the main property of the cloud, the network’s capabilities grow elastically with the number of users. Further plugins can be developed easily. An app market that is included allows to provide these plugins in order to extend the capabilities and applications in the social network on the fly.
Enormous application opportunities without operating costs are the main reason to use the „P2P Framework for Social Networks“ emphasize the researchers of the corresponding project group at the University of Paderborn. The software as a prototype is already in use. Contact us for more information.
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Claremont Report on Database Research: Research Directions (Beng Chin Ooi)
This is a set of slides from the Claremont Report on Database Research, see http://db.cs.berkeley.edu/claremont/ for more details. These particular slides are from a "Research Directions" talk by "Beng Chin Ooi." (Uploaded for discussion at the Stanford InfoBlog, http://infoblog.stanford.edu/.)
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Agata provides high speed cyber solutions including a full featured Forensics suite with Meta Data and tens of thousands of dynamic policy rules, Layer-7 Intelligence, Network Analytics, filtered sessions and traffic recording.
Backed by 20 years of specialized research and development of traffic management and security solutions for top tier customers, Agata is able to provide best in class high-end technological products. Agata appliances allow enterprises to secure networks using state of the art cyber solutions. Agata DPI empowers the user to find, record, analyze and track security events and vulnerabilities including Zero-Day exploits.
The overview presentation includes a use case and a description of the different applications for Agata DPI.
Privacy Preserved Distributed Data Sharing with Load Balancing Scheme
Data sharing services are provided under the Peer to Peer (P2P) environment. Federated
database technology is used to manage locally stored data with a federated DBMS and provide unified
data access. Information brokering systems (IBSs) are used to connect large-scale loosely federated data
sources via a brokering overlay. Information brokers redirect the client queries to the requested data
servers. Privacy preserving methods are used to protect the data location and data consumer. Brokers are
trusted to adopt server-side access control for data confidentiality. Query and access control rules are
maintained with shared data details under metadata. A Semantic-aware index mechanism is applied to
route the queries based on their content and allow users to submit queries without data or server
information.
Distributed data sharing is managed with Privacy Preserved Information Brokering (PPIB)
scheme. Attribute-correlation attack and inference attacks are handled by the PPIB. PPIB overlay
infrastructure consisting of two types of brokering components, brokers and coordinators. The brokers
acts as mix anonymizer are responsible for user authentication and query forwarding. The coordinators
concatenated in a tree structure, enforce access control and query routing based on the automata.
Automata segmentation and query segment encryption schemes are used in the Privacy-preserving
Query Brokering (QBroker). Automaton segmentation scheme is used to logically divide the global
automaton into multiple independent segments. The query segment encryption scheme consists of the
preencryption and postencryption modules.
The PPIB scheme is enhanced to support dynamic site distribution and load balancing
mechanism. Peer workloads and trust level of each peer are integrated with the site distribution process.
The PPIB is improved to adopt self reconfigurable mechanism. Automated decision support system for
administrators is included in the PPIB.
LifeSocial - A P2P-Platform for Secure Online Social Networks
This is a summary presentation of Dr.-Ing. Kalman Graffi on LifeSocial - the P2P-Platform for Secure Online Social Networks
Case Study—PART 1—Jurisdictional Declaration CriteriaLevels .docx
Case Study—PART 1—Jurisdictional Declaration
Criteria
Levels of Achievement
Content
(70%)
Advanced
92-100%
Proficient
84-91%
Developing
1-83%
Not Present
Total
Economic Development Location
18.5 to 20 points:
Location is clearly delineated, fully meeting assignment standards.
16.5 to 18 points:
Meets most of the assignment standards.
1 to 16 points:
Location needs further specification before the student may proceed.
0 points
Not present
Action Research Statement of Work Understood and Signed
13.5 to 15 points:
Template completed.
12.5 to 13 points:
Template partially completed.
1 to 12 points:
Student Modified Template
0 points
Not present
Structure (30%)
Advanced
92-100%
Proficient
84-91%
Developing
1-83%
Not present
Total
Formatting, Spelling, and Grammar
13.5 to 15 points:
No spelling or grammar errors
12.5 to 13 points:
1-2 spelling and/or
grammar errors
1 to 12 points:
3-4 spelling and/or
grammar errors
0 points
Not present
Professor Comments:
Total:
/50
Running head: NETWORK DESCRIPTION 1
NETWORK DESCRIPTION 6
NETWORK DESCRIPTION
Institution Affiliation
Student Name
Date
HEALTH-COP COMPANY
Network and Workflow Description
Data mining is a complex process that involves several activities undertaken sequentially for the entire process to be successful. As such, there are specific protocols that must be followed in data mining. The desired goals and objectives are the guiding principles upon which the type of data to be analyzed is identified. The main goal for Health-Cop is to establish links between diet composition and health issues. More specifically, the company will focus on analysis of data from various health facilities, websites, databases and health journals. The analysis is intended to provide new forms of data that can be interpreted to give meaningful patterns. To facilitate the process of data mining, there are several aspects that must be considered such as: statistics, clustering of data, rules of association, data classification, visualization and the decision tree.
Network Description
Health Cop company will set up is network system using both the windows and Linux based operating system. The company will have 10 desktop computers and 5 portable computers. The 10 desktop computers will be connected together via a metered Wi-Fi service. The desktops will be the main engine of the company. All the desktops will be configured with an algorithm that constantly searches for specific keywords from various databases. The portables computers will be connected to the internet via modems. A modem is much safer since it limits the connectivity to only the device being used. Internet connectivity via modem is facilitated through local area networks (LAN), through to the service providers, (Cui, et.al., 2016). Multiple firewalls are set up within the company networks to sort out undesired data traffic from the local network on the computer devices.
The most suitable firewall for the network w ...
Peer Sim & P2P
Brief description on P2P networks and then some slides about PeerSim simulation on Max Min observer functions.
Network Planning & Design: An Art or a Science?
With the rapid growth of IP networks in South-Asia in the past
few years, and the advent of new services and applications -- be they
wireless/wireline broadband Internet access, cable telephony, VoIP, remote
teleconferencing, e-governance, or mobile entertainment -- a key
issue before carriers is how to design and operate their networks as
methodically and as efficiently as possible to maximize both customer
retention and profits.
While several best practices typically emerge from each provider\'s
unique situation and cumulative experience (the "art" of network design), there
are certain operational precepts that systematize and streamline the
complex, multi-dimensional task of designing and managing modern, operational
IP networks (the "science" of network design).
In this talk, we first discuss the overall network design process and the
manner in which control over the network must be exercised at varying
timescales to achieve efficient operation. Next we discuss the
functions that the operational, engineering, and planning teams at a
carrier must typically execute, their inter-relationships, and
the importance/rationale for performing them to optimize network
performance.
We then outline some network design best practices that have evolved
over the past decade, drawing upon examples of carriers such as
Sprint, Global Crossing, AT&T, NTT, and Reliance. We conclude with
a look at some automated traffic engineering and planning tools,
and how they enable carriers to rapidly identify potential
performance problems, rigorously experiment with/evaluate design
options, perform thorough scenario and network analysis, and
develop robust designs.
Security Delivery Platform: Best practices
Security Delivery Platform: Best practices
The traditional Security model was one that operated under simple assumptions. Those assumptions led to deployment models which in todays’ world of cyber security have been proven to be quite vulnerable and inadequate to growing amount and diversity of threats.
A Security Delivery Platform addresses the above considerations and provides a powerful solution for deploying a diverse set of security solutions, as well as scaling each security solution beyond traditional deployments. Such platform delivers visibility into the lateral movement of malware, accelerate the detection of ex-filtration activity, and could significantly reduce the overhead, complexity and costs associated with such security deployments.
In today’s world of industrialized and well-organized cyber threats, it is no longer sufficient to focus on the security applications exclusively. Focusing on how those solutions get deployed together and how they get consistent access to relevant data is a critical piece of the solution. A Security Delivery Platform in this sense is a foundational building block of any cyber security strategy.
Analytics for automating critical infrastructures
At OFC 2023, Achim Autenrieth outlined the way forward for critical infrastructure automation, exploring SDN, streaming telemetry, network analytics and AI/ML.
IEEE CCNC 2011: Kalman Graffi - LifeSocial.KOM: A Secure and P2P-based Soluti...
The phenomenon of online social networks reaches millions of users in the Internet nowadays. In these, users present themselves, their interests and their social links which they use to interact with other users. We present in this paper LifeSocial.KOM, a p2p-based platform for secure online social networks which provides the functionality of common online social networks in a totally distributed and secure manner. It is plugin-based, thus extendible in its functionality, providing secure communication and access-controlled storage as well as monitored quality of service, addressing the needs of both, users and system providers. The platform operates solely on the resources of the users, eliminating the concentration of crucial operational costs for one provider. In a testbed evaluation, we show the feasibility of the approach and point out the potential of the p2p paradigm in the field of online social networks.
International Journal of Database Management Systems (IJDBMS)
International Journal of Database Management Systems (IJDBMS) is a bi monthly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the database management systems & its applications. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on understanding Modern developments in this field, and establishing new collaborations in these areas.Authors are solicited to contribute to the journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the areas of Database management systems.
Ijdbms
International Journal of Database Management Systems (IJDBMS) is a bi monthly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the database management systems & its applications. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on understanding Modern developments in this field, and establishing new collaborations in these areas.Authors are solicited to contribute to the journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the areas of Database management systems.
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IEEE CRS 2014 - Secure Distributed Data Structures for Peer-to-Peer-based Soc...
Jens Janiuk, Alexander Mäcker, Kalman Graffi -
Secure Distributed Data Structures for Peer-to-Peer-based Social Networks
In IEEE CTS ’14: Proceedings of the IEEE International Conference on Collaboration Technologies and Systems, 2014.
Abstract—Online social networks are attracting billions of nowadays, both on a global scale as well as in social enter- prise networks. Using distributed hash tables and peer-to-peer technology allows online social networks to be operated securely and efficiently only by using the resources of the user devices, thus alleviating censorship or data misuse by a single network operator. In this paper, we address the challenges that arise in implementing reliably and conveniently to use distributed data structures, such as lists or sets, in such a distributed hash-table- based online social network. We present a secure, distributed list data structure that manages the list entries in several buckets in the distributed hash table. The list entries are authenticated, integrity is maintained and access control for single users and also groups is integrated. The approach for secure distributed lists is also applied for prefix trees and sets, and implemented and evaluated in a peer-to-peer framework for social networks. Evaluation shows that the distributed data structure is convenient and efficient to use and that the requirements on security hold.
LibreSocial - P2P Framework for Social Networks - Overview
Digital social networks promise to activate the social participants and to support them in their interactivity patterns. Private relationships evolve to friendships, professional contacts define competence networks and political opinions emerge to revolutionary trends. Social networks often act as driving force to intensify the social and global relationships.
In future, using the „Peer-to-Peer Framework for Social Networks“ everybody may host easily and out-of-the-box his personal online social network, without operating costs and without security risks. The framework offers a large set of interactive apps, which can be are freely combinable and technically limitless in their applicability.
The operating costs for such a social network are a revolutionary: no expenses arise. Whether a network for 10 users or for a global network of Millions of users, one aspect is common: due to the peer-to-peer technology used, no expenses arise. Researchers led by Dr.-Ing. Kalman Graffi at the University of Paderborn combined in the framework the advantages of decentralized peer-to-peer applications, of an app market as well as the cloud principle.
The social network is maintained in a peer-to-peer fashion through the computational power of the users’ devices, expensive servers are not needed. Still the availability, retrievability and security of the users‘ data are guaranteed. Each user keeps total control on the access control rights of his data. Similar to the main property of the cloud, the network’s capabilities grow elastically with the number of users. Further plugins can be developed easily. An app market that is included allows to provide these plugins in order to extend the capabilities and applications in the social network on the fly.
Enormous application opportunities without operating costs are the main reason to use the „P2P Framework for Social Networks“ emphasize the researchers of the corresponding project group at the University of Paderborn. The software as a prototype is already in use. Contact us for more information.
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Vitaliy Rapp and Kalman Graffi. Continuous Gossip-based Aggregation through Dynamic Information Aging. In IEEE ICCCN ’13: Proceedings of the International Conference on Computer Communications and Networks, 2013.
Abstract—Existing solutions for gossip-based aggregation in peer-to-peer networks use epochs to calculate a global estimation from an initial static set of local values. Once the estimation converges system-wide, a new epoch is started with fresh initial values. Long epochs result in precise estimations based on old measurements and short epochs result in imprecise aggregated estimations. In contrast to this approach, we present in this paper a continuous, epoch-less approach which considers fresh local values in every round of the gossip-based aggregation. By using an approach for dynamic information aging, inaccurate values and values from left peers fade from the aggregation memory. Evaluation shows that the presented approach for continuous information aggregation in peer-to-peer systems monitors the system performance precisely, adapts to changes and is lightweight to operate.
IEEE ICC 2013 - Symbiotic Coupling of P2P and Cloud Systems: The Wikipedia Case
Lars Bremer and Kalman Graffi. Symbiotic Coupling of P2P and Cloud Systems: The Wikipedia Case. In IEEE ICC ’13: Proceedings of the International Conference on Communications, 2013.
Abstract—Comparative evaluations of peer-to-peer protocols through simulations are a viable approach to judge the per- formance and costs of the individual protocols in large-scale networks. In order to support this work, we enhanced the peer- to-peer systems simulator PeerfactSim.KOM with a fine-grained analyzer concept, with exhaustive automated measurements and gnuplot generators as well as a coordination control to evaluate a set of experiment setups in parallel. Thus, by configuring all experiments and protocols only once and starting the simulator, all desired measurements are performed, analyzed, evaluated and combined, resulting in a holistic environment for the comparative evaluation of peer-to-peer systems.
Abstract—Cloud computing offers high availability, dynamic scalability, and elasticity requiring only very little administration. However, this service comes with financial costs. Peer-to-peer systems, in contrast, operate at very low costs but cannot match the quality of service of the cloud. This paper focuses on the case study of Wikipedia and presents an approach to reduce the operational costs of hosting similar websites in the cloud by using a practical peer-to-peer approach. The visitors of the site are joining a Chord overlay, which acts as first cache for article lookups. Simulation results show, that up to 72% of the article lookups in Wikipedia could be answered by other visitors instead of using the cloud.
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In this lunchtalk we discuss p2p-based online social networks
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Kalman Graffi - 1 Slide - 2010
This slides presents the research focus of Dr.-Ing. Kalman Graffi in 2010
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The peer-to-peer paradigm shows the potential to provide the same functionality and quality like client/server based systems, but with much lower costs. In order to control the quality of peer-to-peer systems, monitoring and management mechanisms need to be applied. Both tasks are challenging in large-scale networks with autonomous, unreliable nodes. In this paper we present a monitoring and management framework for structured peer-to-peer systems. It captures the live status of a peer-to-peer network in an exhaustive statistical representation. Using principles of autonomic computing, a preset system state is approached through automated system re-configuration in the case that a quality deviation is detected. Evaluation shows that the monitoring is very precise and lightweight and that preset quality goals are reached and kept automatically.
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QuaP2P Lunchtalk on Online Social Networks 2010 - LifeSocial
QuaP2P Lunchtalk on Online Social Networks 2010 - LifeSocial
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Kalman Graffi - Sichere Digitale Soziale Netzwerke – Eine Chance für E-Learni...
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IEEE P2P 2009 - Kalman Graffi - Monitoring and Management of Structured Peer-...
Cebit 2008 - PeerfactSim.KOM - A Simulator for Large Scale Peer-to-Peer Systems
Cebit 2008 - PeerfactSim.KOM - A Simulator for Large Scale Peer-to-Peer Systems
Cebit 2008 - PeerfactSim.KOM - Ein Simulator für hochskalierede Peer-to-Peer ...
Cebit 2008 - PeerfactSim.KOM - Ein Simulator für hochskalierede Peer-to-Peer ...
Kalman Graffi - 5 Slides Demo - 2008
- 1. A System Management Framework for Self-Optimizing P2P Systems Peers α β λ μ Information Management System Analysis, modeling and interpretation Using info. to gain efficiency
- 2. KOM Research Program Ubiquitous Communication Mobile Networking Peer-to-Peer Networking IT Architectures Knowledge Media E-Learning E-Business & E-Finance Communication Services & IP Telephony Workflows Network Mechanisms Quality of Service, Dependability & Security Application Areas Fundamentals Research Areas Self-optimizing P2P Systems