21,286 research outputs found
SDN Access Control for the Masses
The evolution of Software-Defined Networking (SDN) has so far been
predominantly geared towards defining and refining the abstractions on the
forwarding and control planes. However, despite a maturing south-bound
interface and a range of proposed network operating systems, the network
management application layer is yet to be specified and standardized. It has
currently poorly defined access control mechanisms that could be exposed to
network applications. Available mechanisms allow only rudimentary control and
lack procedures to partition resource access across multiple dimensions.
We address this by extending the SDN north-bound interface to provide control
over shared resources to key stakeholders of network infrastructure: network
providers, operators and application developers. We introduce a taxonomy of SDN
access models, describe a comprehensive design for SDN access control and
implement the proposed solution as an extension of the ONOS network controller
intent framework
Security for Grid Services
Grid computing is concerned with the sharing and coordinated use of diverse
resources in distributed "virtual organizations." The dynamic and
multi-institutional nature of these environments introduces challenging
security issues that demand new technical approaches. In particular, one must
deal with diverse local mechanisms, support dynamic creation of services, and
enable dynamic creation of trust domains. We describe how these issues are
addressed in two generations of the Globus Toolkit. First, we review the Globus
Toolkit version 2 (GT2) approach; then, we describe new approaches developed to
support the Globus Toolkit version 3 (GT3) implementation of the Open Grid
Services Architecture, an initiative that is recasting Grid concepts within a
service oriented framework based on Web services. GT3's security implementation
uses Web services security mechanisms for credential exchange and other
purposes, and introduces a tight least-privilege model that avoids the need for
any privileged network service.Comment: 10 pages; 4 figure
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Formally based semi-automatic implementation of an open security protocol
International audienceThis paper presents an experiment in which an implementation of the client side of the SSH Transport Layer Protocol (SSH-TLP) was semi-automatically derived according to a model-driven development paradigm that leverages formal methods in order to obtain high correctness assurance. The approach used in the experiment starts with the formalization of the protocol at an abstract level. This model is then formally proved to fulfill the desired secrecy and authentication properties by using the ProVerif prover. Finally, a sound Java implementation is semi-automatically derived from the verified model using an enhanced version of the Spi2Java framework. The resulting implementation correctly interoperates with third party servers, and its execution time is comparable with that of other manually developed Java SSH-TLP client implementations. This case study demonstrates that the adopted model-driven approach is viable even for a real security protocol, despite the complexity of the models needed in order to achieve an interoperable implementation
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