TWiC-Health

This application uses the Near Field Communications (NFC) interface of a phone to read a Transportation Worker Identification Worker (TWIC) cards issued by the Transportation Security Administration (TSA) under the Department of Homeland Security (DHS).

The application is intended as a quick and easy tool for TWIC card holders to ensure their TWIC card is working and the data is still valid for entry into one or more maritime facilities.

The application requires an Android operating system of 4.5.4 or higher (Version 5.x or higher has been tested) and the smartphone must support an NFC interface. For example, Samsung phones such as the Note IV and newer are encouraged to be used for this application to ensure the latest NFC support for U.S. Government issued contactless cards is present in the smart phone.

The application only supports a phone size screen; not tablets (which typically do not support NFC).

The smartphone must have the NFC interface enabled (through the application will open the NFC settings dialogue to remind the phone owner to turn on NFC should the NFC interface not be active when this application is launched).

The application will connect to a TWIC card via the NFC interface, read the static data from the card to display unique card identifiers, verifies the TSA digital signatures of accessible data objects and to check the expiration date of the TWIC card. This application also checks the static card identifier against the TSA Canceled Card List (CCL) which informs the TWIC card holder if the card is still trusted by TSA.