Paparo said INDOPACOM runs a Bitcoin node and tests the protocol to secure military networks.Senate testimony on April 21 cast Bitcoin as a cybersecurity tool with national security use.A single U.S.-run Bitcoin node would not threaten decentralization, but would show defense testing. The U.S. military has moved from studying Bitcoin on paper to testing it inside a live security environment, according to Admiral Samuel Paparo. Speaking on April 21 before the Senate Armed Services Committee, the Indo-Pacific Command chief said his command is running a node and carrying out operational tests with the protocol.JUST IN: The U.S. Military is running a Bitcoin Node.Admiral Samuel Paparo, 4-Star Commander of INDOPACOM, confirms the USA is directly participating in the BTC network for "operational tests to secure and protect networks." pic.twitter.com/GdZxT3olb2— Bitcoin Archive (@BitcoinArchive) April 22, 2026His testimony marked the first public moment in congressional proceedings when a sitting U.S. combatant commander described the network as a national security asset. Paparo made the comments while responding to Senator Tommy Tuberville of Alabama, who raised the issue in the context of strategic competition with China.Paparo Casts the Protocol as a Cybersecurity ToolPaparo described the system as “a peer-to-peer, zero-trust transfer of value” and said support for all instruments of national power was beneficial. He told lawmakers the work was centered on computer science, not monetary policy.He also said proof-of-work has important cybersecurity uses. In his account, the design can help protect data and increase the real-world cost for adversaries carrying out cyber operations. The admiral disclosed that his command already has a node active on the network.He said the command is conducting several operational tests to secure and protect networks using the protocol. Paparo added that he could provide classified details if senators requested them.What Running a Node Actually MeansA node is a computer running the network’s software with a full copy of the blockchain. It validates every transaction and block against consensus rules, and relays verified data across the peer-to-peer system.That role is different from mining. Nodes do not produce blocks for rewards. Instead, they enforce protocol rules, reject invalid data, and give operators direct access without relying on third parties.For INDOPACOM, that means the command is participating directly in the network rather than merely observing it. The testimony also suggested the command has moved beyond theoretical review and into hands-on testing of the protocol’s cryptographic design.Why the Disclosure MattersEssentially, the blockchain is supported by tens of thousands of nodes distributed worldwide. That decentralized structure is one of its defining features, as no single operator controls transaction validation across the system.The report estimates there were 15,000 to 20,000 publicly reachable full nodes in early 2026. However, the real number is likely higher since many operate behind firewalls and are not visible to public scans.Against that backdrop, one government-run node would not threaten the network’s independence. Even so, the disclosure may draw attention, given that censorship resistance has long been presented as a defense against control by powerful states.A Wider Federal Security ContextPaparo’s remarks fit into a broader federal shift in how the asset is being discussed. Lawmakers have advanced the BITCOIN Act, while a strategic Bitcoin reserve has been pursued through executive action.The hearing also echoed ideas already circulating in defense and policy circles. Major Jason Lowery’s “Softwar” thesis argued that proof-of-work could function as a form of cyber power projection.Similarly, Tuberville framed the exchange through the lens of U.S.-China rivalry. He noted that Beijing’s top monetary think tank has published its own strategic research on the asset, placing the Senate discussion inside a larger geopolitical competition.Also Read: Bank of Korea Chief Pledges Blockchain Push and Crypto Growth