IBM, Merck and Walmart have been chosen for a U.S. Food and Drug Administration pilot program that will explore using blockchain technology to improve the security of prescription drug supply and distribution.

The companies said they would work with consultancy KPMG to create a shared blockchain network that will allow real-time monitoring of products in the pharmaceutical supply chain.

The project has been authorized under the U.S. Drug Supply Chain Security Act. DQSA, was enacted by Congress on November 27, 2013. Title II of DQSA outlines steps to build an electronic, interoperable system to identify and trace certain prescription drugs as they are distributed in the United States.

The act was passed to improve FDA’s ability to help protect consumers from exposure to drugs that may be counterfeit, stolen, contaminated, or otherwise harmful. The system will also improve detection and removal of potentially dangerous drugs from the drug supply chain to protect U.S. consumers.

Additionally, the DSCSA directs FDA to establish national licensure standards for wholesale distributors and third-party logistics providers, and requires these entities report licensure and other information to FDA annually.

The FDA has previously used the DSCSA to issue a warning letter to drug distributor McKesson Corp for violations involving opioid medications.

The new project is aimed at reducing the time needed to track and trace prescription drugs, improving access to reliable distribution information and ensuring products are handled appropriately and stored at the right temperature while being distributed, the companies said in a statement.

Blockchain technology, originally conceived a decade ago as the basis for the cryptocurrency bitcoin, will help stakeholders establish a permanent record and can be integrated with existing systems used to trace products while they are distributed.

The project is scheduled to be completed in the fourth quarter of 2019 and results will be published in a report, the companies said.