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Terrorist Screening Center Encounter Information (TSCEI) Service Specification, Version 1.0

NCJ Number
Date Published

This Service Specification package provides the files and documents necessary for stakeholders to gain an understanding of the Terrorist Screening Center Encounter Information Service and the rules applicable to its implementation; the main components of the Service Specification are the Service Description and Service Interface Description documents, artifacts and service interface folders with related files, as well as metadata files.


The Service Description Document (SDD) provides stakeholders with all aspects of the Terrorist Screening Center Encounter Information (TSCEI) Service that are not directly tied to the physical implementation of the service, while the two Service Interface Description Documents (SIDD) provide a description of the physical implementation of the TSCEI for sending and receiving entities. The TSCEI Service is designed to provide Positive Encounter information and updates to state or U.S. government territory designated fusion centers; its scope is limited to law enforcement agencies’ encounter information that is sent to the designated fusion center based on the location of the encounter. The SDD lays out the Service overview, including scope, capabilities, real-world effects, security classification, service specification package version, and more; it also provides business scenarios with primary and alternative flows; Service interoperability requirements, including Service assumptions and dependencies, policies and contracts, security, and other requirements; as well as service model information, including behavior and information models. The SIDDs in this Service Package provide companion documents to the TSCEI Service Description Document for sender and receiver services. They provide execution context such as reachability and intermediaries; Service interaction requirements; interface description requirements; message exchange patterns and definition mechanisms; policies and contracts, including automated and nonautomated service contracts, and umbrella agreements; security and privacy information; and service testing.