| S. E. Czerwinski, B. Y. Zhao, T. D. Hodes, A. D. Joseph, and R. H. Katz, "An Architecture for a Secure Service Discovery Service," in Proceedings of Mobicom 99, Seattle, WA, August 1999. |
....and context aware computing. One part of this research has centered around how to detect and represent the physical location and context of computers and their users via GPS, wireless LAN, beacons, etc. KBM 00, Pra00, BPG 00] Other efforts have centered around network service discovery [CZH 99, GPVD99, GCL 99, Con, Mic] Network service discovery aims to automatically discover network services such as printers, disk farms, copiers etc. in the network vicinity, making manual configuration of network addresses and service types unnecessary. This paper describes a research prototype ....
....all machines where automatic DA discovery should work. As SLP is centered around DAs it is possible to send LDAP (Lightweight Directory Access Protocol) formatted search strings [RFC2254] to a DA to match services using wildcards and boolean expressions over an open set of service attributes. In [CZH 99] Czerwinski et al. describe the Secure Service Discovery Service (SDS) SDS is closely related to SLP, but emphasizes security and privacy. It supports that only authorized clients discover certain services by using a mix of private and public key cryptography. SDS utilizes XML to format service ....
Steven E. Czerwinski, Ben Y. Zhao, Todd D. Hodes, Anthony D. Joseph, and Randy H. Katz. An architecture for a secure service discovery service. In Mobile Computing and Networking, pages 24--35, 1999.
....static high availability services. Last, and perhaps most importantly, query support is rudimentary. Only key lookups with primitive qualifiers are supported, which is insu#cient for realistic service discovery use cases (see Figure 5 for examples) SDS. The Service Discovery Service (SDS) [28] is interesting in that it mandates secure channels with authentication and tra#c encryption, and privacy and authenticity of service descriptions. SDS servers can be organized in a distributed hierarchy. For e#ciency, each SDS node in a hierarchy can hold an index of the content of its sub tree. ....
Steven E. Czerwinski, Ben Y. Zhao, Todd Hodes, Anthony D. Joseph, and Randy Katz. An Architecture for a Secure Service Discovery Service. In Fifth Annual Int. Conf. on Mobile Computing and Networks (MobiCOM '99), Seattle, WA, August 1999.
....a Grid system 5 is designed and implemented in the context of the Globus system [FoK98] In [FoK98b] the security policy focuses on authentication and a framework to implement this policy has been proposed. A design and implementation of a secure Service Discovery Service (SDS) is presented in [CzZ99]. SDS can be used by service providers as well as clients. Service providers use SDS to advertise their services that are available or already running while clients use SDS to discover these services. A model for supporting trust based on experience and reputation is proposed in [AbH00] This ....
S. E. Czerwinski, B. Y. Zhao, T. D. Hodes, A. D. Joseph, and R. H. Katz, "An architecture for a secure service discovery service," 5th Annual Int'l Conference on Mobile Computing and Networks (MobiCom '99), 1999.
....architecture for a Grid system is designed and implemented in the context of the Globus system. In [6] the security policy focuses on authentication and a framework to implement this policy have been proposed. A design and implementation of a secure service discovery service (SDS) is presented in [2]. SDS can be used by service providers as well as clients. Service providers use SDS to advertise their services that are available or already running while clients use SDS to discover these services. A model for supporting trust based on experience and reputation is proposed in [1] This ....
S. E. Czerwinski, B. Y. Zhao, T. D. Hodes, A. D. Joseph, and R. H. Katz, "An architecture for a secure service discovery service," 5th Annual Int'l Conference on Mobile Computing and Networks (Mobicom '99), 1999.
....applications, allowing services to register with a common substrate that provides basic services discovery, resource management, security. Although most such frameworks rely on static component linkages, a growing number of systems (Active Frames [23] Eager Handlers [33] Ninja [28], Active Streams [4] CANS [12] Partitionable Services [16] Conductor [21] and a recent version of Globus [9] advocate a more dynamic model, where components are combined at run time, based on the current state of the environment and QoS requirements of the clients. This dynamic model enables ....
....which is automatically inferred) and finer grained control (the rights afforded a request can be modulated to the credentials associated with it as opposed to the local credentials these translate to) Expressing component and network properties. Most dynamic component based frameworks ([28, 21, 12, 16]) rely on an application registration step, where complete specifications of the application components are provided to permit automated deployment planning. Our use of dRBAC credentials to model general application and network level properties and constraints is in marked contrast to other ....
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S. Czerwinski et al. An architecture for a secure service discovery service. In Mobile Computing and Networking, pages 24--35, 1999.
....knowledge to determine closest possible matches to a given service request. Anamika: A simple Reactive Service composition system over Bluetooth Project Anamika addresses the problem of service composition in a mobile ad hoc environment. The traditional service composition architectures [6] [10], 23] are built over the fixed network infrastructures. They assume the presence of a centralized, highly available manager that handles complex queries requiring multiple services to be executed in a certain manner. This assumption does not hold in an ad hoc environment. In addition, the central ....
S. Czerwinski, B. Zhao, T. Hodes, A. Joseph, and R. Katz. An Architecture for a Secure Service Discovery Service. In Fifth Annual International Conference on Mobile Computing and Networks (MobiCom '99), pages 24 -- 35, Seattle, 1999.
....service discovery systems. Jini [13] allows a client to locate a service and download its proxy interface, matching on the class of the proxy. The Service Location Protocol (SLP) focuses on the protocol for automatic discovery [10] Czerwinski et al. focus on expressiveness and security [8], and Castro et al. deals with inter domain service discovery [3] DeapSpace [15] and Heidemann et al. 11] propose approaches for discovery in ad hoc sensor networks. None of these systems, however, has explicit support for context sensitive names or subscriptions. 6 Summary In this paper we ....
S. E. Czerwinski, B. Y. Zhao, T. D. Hodes, A. D. Joseph, and R. H. Katz. An architecture for a secure service discovery service. In Proceedings of the 5th Annual International Conference on Mobile Computing and Networking, pages 24--35, Seattle, WA, August 1999. ACM Press.
....of the user. Such a system must be able to continuously adapt to changes in user locations and needs, respond both to component failures and newly available resources, and maintain continuity of service as the set of available resources change. This requires more than service discovery [3] or simple content based routing [4] it necessitates a certain degree of planning involving continuous reevaluation of available alternatives, as well as heuristic compromises to best address the application s requirement using imperfect resources in the changing environment of the application ....
....and migrates the session to the better alternative. A service description is expressed as a set of constraints on the properties of an acceptable resource. As opposed to the resource discovery systems that find a resource by performing an exact pattern match on its attribute value pairs [3][4] the use of a constraint language in SoNS, for stating an evaluation criteria, offers the flexibility to evaluate and compare the alternatives available in a given context in order to find the closest match to the requirements of an application. The design of SoNS handles the heterogeneity of ....
[Article contains additional citation context not shown here]
S. Czerwinski et al. An architecture for a secure service discovery service. In Proc. of MobiCom-99, pages 24-35, N.Y., August 1999
....The work of Patel and Crowcroft focuses on security solutions for mobile user devices [27] Unfortunately, their work uses asymmetric cryptography and is hence too expensive for the environments we envision. The work of Czerwinski et al. also relies on asymmetric cryptography for authentication [4]. Stajano and Anderson discuss the issues of bootstrapping security devices [39] Their solution requires physical contact of the new device with a master device to imprint the trusted and secret information. Zhou and Hass propose to secure ad hoc networks using asymmetric cryptography [45] ....
Steven E. Czerwinski, Ben Y. Zhao, Todd D. Hodes, Anthony D. Joseph, and Randy H. Katz. An architecture for a secure service discovery service. In Fifth annual ACM/IEEE international conference on Mobile computing and networking, pages 24 -- 35, Seattle, WA USA, August 1999.
....[26] leading to highly specialized content addressable networks centered around the theme of distributed hash table lookup. Simple queries for exact match (i.e. given a flat set of attribute values find all tuples that carry exactly the same attribute values) are assumed in systems such as SDS [27] and Jini [28] Others such as LDAP [29] and MDS [30] consider simple queries from a hierarchical namespace. None support rich and expressive general purpose query languages such as XQuery [20] and SQL [31] The key problems then are: What are the detailed architecture and design options for ....
Steven E. Czerwinski, Ben Y. Zhao, Todd Hodes, Anthony D. Joseph, and Randy Katz. An Architecture for a Secure Service Discovery Service. In Fifth Annual Int'l. Conf. on Mobile Computing and Networks (MobiCOM '99), Seattle, WA, August 1999.
....specialized content addressable networks centered around the theme of distributed hash table lookup. Note further that almost no queries are exact match queries (i.e. given a flat set of attribute values find all tuples that carry exactly the same attribute values) assumed in systems such as SDS [41] and Jini [42] Our approach is distinguished in that it not only supports all of the above query types, but it also supports queries from the rich and expressive general purpose query languages XQuery [12] and SQL [13] Pipelining. For a survey of adaptive query processing, including pipelining, ....
Steven E. Czerwinski, Ben Y. Zhao, Todd Hodes, Anthony D. Joseph, and Randy Katz. An Architecture for a Secure Service Discovery Service. In Fifth Annual Int. Conf. on Mobile Computing and Networks (MobiCOM '99), Seattle, WA, August 1999.
....[14] P2P systems are built for a single application and data type and do not support queries from a general purpose query language. For example, DNS, Gnutella [21] Freenet [22] Tapestry [23] Chord [24] and Globe [25] only support lookup by key (e.g. globally unique name) Others such as SDS [26], LDAP [14] and MDS [15, 16] support simple specialpurpose query languages, leading to special purpose solutions unsuitable for multi purpose service and resource discovery in large heterogeneous distributed systems spanning many administrative domains. 27, 28, 29] discuss in isolation select ....
.... State established at a remote location may eventually be discarded unless refreshed by a stream of subsequent confirmation notifications [37] In this manner, component failures and changes are tolerated in the normal mode of operation rather than addressed through a separate recovery procedure [26]. Lack of refresh indicates service failure, shutdown or change. The responsibility for state maintenance is displaced by moving it from the registry to the publishing services. Registries keep service links (and perhaps also descriptions) as soft state, that is, they are kept for a limited ....
[Article contains additional citation context not shown here]
Steven E. Czerwinski, Ben Y. Zhao, Todd Hodes, Anthony D. Joseph, and Randy Katz. An Architecture for a Secure Service Discovery Service. In Fifth Annual Int. Conf. on Mobile Computing and Networks (MobiCOM '99), Seattle, WA, August 1999.
....for small networks [1 4, 7] or for networks where dynamic updates are relatively uncommon or infrequent (e.t. DNS [9] LDAP [10] They do not work well when the number of resources grows, and updates are common. Static resource partitioning [11] and hierarchical organization of resolvers [5, 6, 12] solve scalable and dynamic resource discovery. Static partitioning relies on some application de ned attribute to divide resource information among resolvers. However, static partitioning does not guarantee good load distribution and burdens clients with selecting the relevant partitions. ....
....dynamic resource discovery. Static partitioning relies on some application de ned attribute to divide resource information among resolvers. However, static partitioning does not guarantee good load distribution and burdens clients with selecting the relevant partitions. Hierarchical approaches [5] organize resolvers around increasingly large domains for which they are responsible. These domains are created around particular attributes of resource descriptions, such as geographical location. Other hierarchical schemes keep data information in local resolvers and create hierarchies to lter ....
Czerwinski, S., Zhao, B., Hodes, T., Joseph, A., Katz, R.: An architecture for a Secure Service Discovery Service. In: Proc. of the Fifth Annual Int. Conf. on Mobile Computing and Networking (MobiCom), ACM Press (1999) 24-35
....angle and a distance R and points a device running the View nder in the desired direction. The View nder then highlights the services discovered within the swept sector. To enable this functionality, the View nder application queries a resource discovery server, such as those proposed in [1, 9, 13], to obtain the global coordinates of the available services. To facilitate the bootstrapping process, the name of the server for the space is advertised on the RF channel by the beacons. We also assume that individual services use their own software compass to obtain their coordinate information, ....
Czerwinski, S., Zhao, B., Hodes, T., Joseph, A., and Katz, R. An Architecture for a Secure Service Discovery Service. In ##### ### ### ####### ##### (Seattle, WA, Aug. 1999), pp. 24-35.
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Steven E. Czerwinski, Ben Y. Zhao, Todd D. Hodes, Anthony D. Joseph, and Randy H. Katz. An architecture for a secure service discovery service. In Proceedings of ACM MOBICOM, August 1999.
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S. E. Czerwinski, B. Y. Zhao, T. D. Hodes, A. D. Joseph, and R. H. Katz, "An Architecture for a Secure Service Discovery Service," in Proceedings of Mobicom 99, Seattle, WA, August 1999.
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Czerwinski, S.E., Zhao, B.Y., Hodes, T.D., Joseph, A.D., and Katz, R.H. An Architecture for a Secure Service Discovery Service. Fifth Annual International Conference on Mobile Computing and Networks (MobiCom '99), Seattle, WA, August 1999, pp. 24-35.
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S. E. Czerwinski, B. Y. Zhao, T. D. Hodes, A. D. Joseph, and R. H. Katz. An Architecture for a Secure Service Discovery Service. In Mobile Computing and Networking (MobiCOM '99), pages 24--35, 1999.
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Steven E. Czerwinski, Ben Y. Zhao, Todd Hodes, Anthony D. Joseph, Randy Katz, "An Architecture for a Secure Service Discovery Service", Proceedings of the fifth Annual International Conference on Mobile Computing and Networks, Seattle, WA, August 1999.
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Steven E. Czerwinski, Ben Y. Zhao, Todd D. Hodes, Anthony D. Joseph, and Randy H. Katz. An architecture for a secure service discovery service. In Mobile Computing and Networking, pages 24--35, 1999.
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S. E. Czerwinski, B. Y. Zhao, T. D. Hodes, A. D. Joseph, and R. H. Katz. An architecture for a secure service discovery service. In Proceedings of the 5th ACM/IEEE International Conference on Mobile Computing MobiCom '99, pages 24--35, 1999.
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S. E. Czerwinski, B. Y. Zhao, T. D. Hodes, A. D. Joseph, and R. H. Katz. An architecture for a secure service discovery service. In Mobile Computing and Networking, pages 24-- 35, 1999.
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