{"id":162428,"date":"2013-03-01T00:00:00","date_gmt":"2013-03-01T00:00:00","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/msr-research-item\/dkal-constructing-executable-specifications-of-authorization-protocols\/"},"modified":"2018-10-16T20:16:20","modified_gmt":"2018-10-17T03:16:20","slug":"212-dkal-constructing-executable-specifications-of-authorization-protocols","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/212-dkal-constructing-executable-specifications-of-authorization-protocols\/","title":{"rendered":"DKAL*: Constructing Executable Specifications of Authorization Protocols"},"content":{"rendered":"<div class=\"asset-content\">\n<p>Many prior trust management frameworks provide authorization logics for specifying policies based on distributed trust. However, to implement a security protocol using these frameworks, one usually resorts to a general-purpose programming language. When reasoning about the security of the entire system, one must study not only policies in the authorization logic but also hard-to-analyze implementation code.<\/p>\n<p>This paper proposes DKAL*, a language for constructing executable specifications of authorization protocols. Protocol and policy designers can use DKAL*\u2019s authorization logic for expressing distributed trust relationships, and its small rule-based programming language to describe the message sequence of a protocol. Importantly, many low-level details of the protocol (e.g., marshaling formats or management of state consistency) are left abstract in DKAL*, but sufficient details must be provided in order for the protocol to be executable.<\/p>\n<p>We formalize the semantics of DKAL*, giving it both an operational semantics and a type system. We prove various properties of DKAL*, including type soundness and a decidability property for its underlying logic. We also present an interpreter for DKAL*, mechanically verified for correctness and security. We evaluate our work experimentally on several examples. Using our semantics, DKAL* programs can be analyzed for various protocol-specific properties of interest. Using our interpreter, programmers obtain an executable version of their protocol which can readily be tested and then deployed.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many prior trust management frameworks provide authorization logics for specifying policies based on distributed trust. However, to implement a security protocol using these frameworks, one usually resorts to a general-purpose programming language. When reasoning about the security of the entire system, one must study not only policies in the authorization logic but also hard-to-analyze implementation [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"footnotes":""},"msr-content-type":[3],"msr-research-highlight":[],"research-area":[13560],"msr-publication-type":[193718],"msr-product-type":[],"msr-focus-area":[],"msr-platform":[],"msr-download-source":[],"msr-locale":[268875],"msr-field-of-study":[],"msr-conference":[],"msr-journal":[],"msr-impact-theme":[],"msr-pillar":[],"class_list":["post-162428","msr-research-item","type-msr-research-item","status-publish","hentry","msr-research-area-programming-languages-software-engineering","msr-locale-en_us"],"msr_publishername":"Springer Verlag","msr_edition":"International Symposium on Engineering Secure Software and Systems (ESSOS 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