NIST IR 8112 Attribute Metadata A Proposed Schema for Evaluating Federated Attributes Paul A. Grassi Naomi B. Lefkovitz Ellen M. Nadeau Ryan J. Galluzzo Abhiraj T. Dinh This publication is available free of charge from: https://doi.org/10.6028/ NIST.IR.8112 NISTIR 8112 Attribute Metadata A Proposed Schema for Evaluating Federated Attributes Pa ul A. Grassi Naomi B. Lefkovitz Ellen M. Nadeau Applied Cybersecurity Division Information Technology Laboratory Ryan J. Galluzzo Abhiraj T. Din h Deloitte & Touche LLP Rosslyn, VA Thi s publication is available free of charge from: https://doi.org/10.6028/NIST.IR.8112 Ja nuary 2018 U.S . Department of Commerce Wilbur L. Ross, Jr., Secretary Na tional Institute of Standards and Technology Walter Copan, NIST Director and Under Secretary of Commerce for Standards and Technology National Institute of Standards and Technology Internal Report 8112 44 pages (January 2018) This publ ication is a vailable f ree of c harge from: https ://doi.org/10.6028/ NIST.IR.8112 Certain commercial entities, equipment, or materials may be identified in this document in order to describe an experimental procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by NIST, nor is it intended to imply that the entities, materials, or equipment are necessarily the best available for the purpose. There may be references in this publication to other publications currently under development by NIST in accordance with its assigned statutory responsibilities. The information in this publication, including concepts and methodologies, may be used by f ederal agencies even before the completion of such companion publications. Thus, until each publication is completed, current requirements, guideline s, and procedures, where they exist, remain operative. For planning and transition purposes, f ederal agencies may wish to closely follow the development of these new publications by NIST. Organizations are encouraged to review all draft publications during public comment periods and provide feedback to NIST. Many NIST cybersecurity publications , ot her than the ones noted above, are available at http://csrc.nist.gov/publications . Comments on this publication may be submitted to: National Institute of Standards and Technology Attn: Applied Cybersecurity Division, Information Technology Laboratory 100 Bureau Drive (Mail Stop 2000) Gaithersburg, MD 20899- 2000 Email: nsticworkshop@nist.gov All comments are subject to release under the Freedom of Information Act (FOIA). NISTIR 8112 ATTRIBUTE METADATA ii Reports on Computer Systems Technology The Information Technology Laboratory (ITL) at the National Institute of Standards and Technology (NIST) promotes the U.S. economy and public welfare by providing technical leadership for the Nation’s measurement and standards infrastructure. ITL develops tests, test methods, reference data, proof of concept implementations, and technical analyses to advance the development and productive use of information technology. ITL’s responsibilities include the development of management, administrative, technical, and physical standards and guidelines for the cost -effective security and privacy of other than national s ecurity -related information in f ederal informa tion systems. Ab stract This NIST Internal Report contains a metadata schema for attributes that may be asserted about an individual during an online transaction. The schema can be used by relying parties to enrich access control policies, as well as during run- time evaluation of an individual’s ability to access protected resources. Attribute metadata could also create the possibility for data sharing permissions and limitations on individual data elements. There are other possible applications of attribute metadata, such as evaluation and execution of business logic in decisio