Cyber Power and National Security

Updated July 2026

Cyber power is now part of national power. It supports intelligence collection, military operations, strategic deterrence, influence activity, economic competition, and homeland defense.

For the United States, cyber is not only a technical security issue. It is a domain of competition. It touches military readiness, critical infrastructure, defense contractors, communications networks, space systems, financial systems, and public trust.

State actors use cyber operations to steal information, prepare the battlespace, hold infrastructure at risk, fund weapons programs, and shape political outcomes. Some operations remain below the threshold of armed conflict. Others can support combat operations or create strategic effects during a crisis.

This page provides a national-security overview of cyber power, state cyber threats, U.S. Cyber Command, cyber deterrence, espionage, cyber warfare, and the security of sensitive defense data.

What Is Cyber Power?

Cyber power is the ability to use, defend, exploit, and contest digital systems to achieve political, military, intelligence, or economic objectives.

It includes defensive cyber operations, offensive cyber capabilities, intelligence collection, network defense, influence support, vulnerability discovery, data protection, and operational resilience.

Cyber power is not measured only by the ability to break into networks. Mature cyber power also requires doctrine, trained personnel, legal authorities, secure infrastructure, intelligence integration, partner coordination, and the ability to act at speed.

At the national-security level, cyber power serves three broad purposes:

Protect national systems, military networks, and critical infrastructure.
Collect intelligence and understand adversary activity.
Support military and strategic objectives during competition, crisis, and conflict.

Cyber operations often occur in the gray zone. They can be deniable, reversible, covert, or ambiguous. That makes them attractive to states that want to impose costs without crossing a clear threshold for military retaliation.

Cyberspace as a Warfighting Domain

Modern military operations depend on networks. Command and control, targeting, logistics, intelligence, surveillance, reconnaissance, communications, navigation, and weapons employment all rely on data.

That makes cyberspace a warfighting domain.

A force that cannot trust its networks cannot fight effectively. A unit that cannot communicate, move data, validate targeting information, or coordinate with higher headquarters loses tempo. In some cases, it loses the ability to operate at all.

Cyber operations can support conventional military campaigns. They can disrupt enemy command systems, degrade logistics, expose force movements, shape the information environment, or defend friendly networks from intrusion.

They can also support deterrence. A state that can impose cyber costs, deny adversary gains, and recover from attack is harder to coerce.

U.S. Cyber Command

U.S. Cyber Command, commonly known as USCYBERCOM, is the combatant command responsible for planning and conducting military cyberspace operations.

The command’s public mission is to direct, synchronize, and coordinate cyberspace planning and operations to defend and advance U.S. national interests in collaboration with domestic and international partners.

USCYBERCOM’s core focus areas include defending the Department of Defense Information Network, supporting combatant commanders, and strengthening the nation’s ability to withstand and respond to cyberattack.

The command works with military service components, interagency partners, allied cyber forces, and private-sector partners. That cooperation is essential because the cyber domain is not neatly divided between military and civilian space.

Many systems that matter in wartime are privately owned. Many attacks on national security targets move through commercial infrastructure. Many indicators of adversary activity are first seen by companies, not government agencies.

Defend Forward and Persistent Engagement

U.S. cyber strategy has moved away from a purely reactive model.

The basic idea is simple. Waiting for adversaries to strike U.S. networks gives the attacker too much initiative. Cyber defense must be active, forward-looking, and intelligence-driven.

“Defend forward” and “persistent engagement” describe a posture in which U.S. cyber forces seek to identify, disrupt, and contest malicious activity closer to its source. This can include operations outside U.S. networks, often in cooperation with allies or partners.

The purpose is not constant escalation. The purpose is to make malicious cyber activity more difficult, more costly, and less effective.

This approach fits the nature of cyberspace. Adversaries operate continuously. They probe, steal, stage access, and prepare options long before a crisis becomes visible to the public.

A passive defense is rarely enough.

China: Strategic Cyber Competition

China is the most capable long-term cyber competitor facing the United States.

U.S. intelligence reporting identifies the People’s Republic of China as the most active and persistent cyber threat to U.S. government, private-sector, and critical infrastructure networks. Chinese cyber activity supports espionage, military modernization, economic advantage, internal control, and potential crisis preparation.

The most serious concern is not ordinary spying. It is pre-positioning.

In a crisis over Taiwan or the Western Pacific, cyber access against U.S. infrastructure, communications, transportation, energy, or logistics networks could be used to slow mobilization, complicate command and control, or impose political pressure.

Public reporting on Volt Typhoon and Salt Typhoon reflects this concern. These campaigns have been associated with stealthy access, living-off-the-land techniques, compromised edge devices, and targeting of infrastructure or telecommunications environments.

China’s cyber strategy should be understood as part of a larger competition. It is linked to military modernization, technology acquisition, influence activity, supply-chain leverage, and efforts to weaken U.S. regional advantages.

Russia: Cyber Operations and Hybrid Conflict

Russia has used cyber operations as part of a broader toolkit of coercion, espionage, sabotage, and information warfare.

Moscow’s cyber activity has targeted governments, political organizations, media entities, military targets, infrastructure, and private companies. Russian operators have also gained practical experience integrating cyber activity with wartime military operations during the war in Ukraine.

That battlefield experience matters.

Russia has learned how cyber effects, electronic warfare, influence operations, drones, missiles, and conventional maneuver interact inside a modern conflict. It has also shown a willingness to accept spillover risk when cyber operations support strategic objectives.

For the United States and NATO, Russia remains a persistent cyber and counterintelligence threat. It can use cyber operations below the threshold of war, during crisis signaling, or as part of a larger military campaign.

Iran: Regional Cyber Pressure and Influence

Iran is not the most technically advanced cyber actor, but it is aggressive, adaptive, and willing to use cyber operations for coercive effect.

Iranian cyber activity often supports regional objectives. It can target U.S. allies, dissidents, political organizations, commercial entities, and critical services. It may also be paired with influence activity or psychological pressure.

Iran’s value as a cyber threat comes from its risk tolerance. Tehran may use destructive or disruptive operations when it believes cyber activity can send a message, impose a cost, or offset conventional weakness.

That makes Iranian cyber activity especially relevant in Middle East crises. It can create pressure without requiring direct military confrontation.

North Korea: Cybercrime as Strategic Finance

North Korea uses cyber operations to support regime survival.

Its cyber program is closely tied to sanctions evasion, cryptocurrency theft, espionage, weapons development, and illicit finance. Unlike China or Russia, North Korea often treats cybercrime as a state revenue stream.

This makes North Korea unusual. Its operators may behave like criminal actors, but the strategic purpose is national. Stolen funds can support weapons programs, military procurement, and regime priorities.

U.S. intelligence reporting has warned that North Korea may expand cyber espionage against defense industrial base companies involved in aerospace, submarine, or hypersonic glide technologies.

For defense firms and technology suppliers, North Korea is therefore not just a financial crime threat. It is also an intellectual property and weapons-development threat.

Cyber Espionage and Intellectual Property Theft

Cyber espionage is one of the most common state uses of cyber power.

States use network access to collect diplomatic information, military plans, technical research, trade secrets, personal data, political intelligence, and defense industrial information.

Espionage is not new. The difference is scale.

A single intrusion can expose years of research. A compromised cloud account can reveal communications across an entire organization. A supply-chain breach can provide access to many downstream targets.

Defense contractors face a special risk. They may hold controlled unclassified information, export-controlled technical data, engineering files, software, test results, logistics information, and program communications.

Much of that material is not classified. It can still be highly valuable to foreign intelligence services.

Cyber Deterrence

Cyber deterrence is difficult.

Attribution can take time. Effects can be ambiguous. Adversaries may operate through proxies, compromised infrastructure, criminal groups, or commercial tools. Some states also calculate that cyber operations are unlikely to trigger a major response.

Deterrence in cyberspace therefore cannot rely on punishment alone.

A stronger model combines denial, resilience, cost imposition, intelligence exposure, law enforcement, sanctions, diplomatic pressure, offensive cyber options, and alliance coordination.

Denial means making attacks less likely to succeed. Resilience means reducing the value of any success. Cost imposition means making malicious activity more expensive for the adversary.

The strongest cyber deterrent is not a single threat. It is a posture.

Cyber Warfare and Armed Conflict

Cyber warfare refers to cyber operations conducted as part of armed conflict or military competition.

These operations may seek to disrupt command systems, degrade logistics, interfere with air defense, affect communications, support deception, expose enemy positions, or reduce the effectiveness of weapons and sensors.

Cyber operations can also target civilian infrastructure. That creates legal, ethical, and escalation concerns.

Military cyber operations must account for distinction, proportionality, necessity, sovereignty, collateral effects, and the possibility of unintended spread. Malware does not always respect borders. Network dependencies are often global.

This is why cyber warfare is not only a technical mission. It is a command decision, an intelligence problem, a legal review process, and a strategic risk calculation.

The Defense Industrial Base

The defense industrial base is a core target set for foreign intelligence services.

Prime contractors, subcontractors, software vendors, research labs, manufacturers, engineering firms, logistics providers, and specialized suppliers all support U.S. defense capability. Many are smaller companies with limited cyber staff.

Adversaries do not need to compromise the Pentagon directly if they can compromise weaker links in the supply chain.

This is why the Department of Defense has placed more emphasis on protecting Federal Contract Information and Controlled Unclassified Information. NIST SP 800-171 provides security requirements for protecting CUI in nonfederal systems and organizations, and CMMC is intended to verify that defense contractors and subcontractors meet required cybersecurity standards.

The strategic issue is not paperwork. It is military advantage.

If adversaries can steal technical drawings, logistics data, maintenance procedures, source code, test data, or program communications, they can shorten development timelines, improve targeting, expose vulnerabilities, or undermine U.S. operational superiority.

File Transfer Security and Sensitive Defense Data

File transfer is a quiet but important part of defense cybersecurity.

Defense organizations and contractors routinely move large files: engineering models, CAD files, imagery, video, sensor data, test results, software builds, technical manuals, logistics data, and controlled program documents.

Those files may be too large or too sensitive for ordinary email or consumer cloud storage. They may also be subject to contractual, regulatory, export-control, or CUI handling requirements.

Secure file transfer should provide encryption, strong authentication, access controls, logging, integrity protection, administrative visibility, and retention controls. In higher-risk environments, it should also support segmentation, policy enforcement, and auditability.

Cloud file transfer can be a good fit when scalability, distributed access, and managed infrastructure are the priority. It can reduce administrative burden and support collaboration across locations.

On-premises or self-managed file transfer may be preferred when an organization needs tighter control over storage location, identity integration, network exposure, compliance boundaries, or sensitive workflows. Some defense contractors also prefer on-premises deployment when they want to reduce dependency on external SaaS platforms for high-value data movement.

High-speed managed file transfer platforms, including systems such as Aspera, are often considered when large files must move quickly across distance without losing administrative control. The point is not speed alone. The point is controlled movement of sensitive data at operational tempo.

For defense work, file transfer security is not a convenience feature. It is part of mission assurance.

Zero Trust and Mission Assurance

Zero trust is now central to U.S. defense cybersecurity.

The basic principle is “never trust, always verify.” Users, devices, applications, and networks should not be trusted simply because they are inside a perimeter.

For military and defense industrial environments, zero trust supports mission assurance. It limits lateral movement, reduces the damage from stolen credentials, and forces more explicit control over who can access which data under which conditions.

Zero trust is not a single product. It is an architecture and operating model.

It includes identity, credentialing, access management, device health, micro-segmentation, encryption, analytics, data tagging, continuous monitoring, and least-privilege access.

The operational goal is containment. If an adversary gets in, they should not be able to move freely.

Cyber, Space, and Communications

Cyber power increasingly overlaps with space and communications security.

Satellites, ground stations, cloud services, telemetry links, positioning systems, and commercial communications networks all support military and civilian operations. They also create attack surfaces.

A future crisis may involve cyber operations against communications providers, logistics platforms, satellite support infrastructure, or data links that connect military forces to national command authorities.

This is why cyber defense cannot be separated from space resilience, telecom security, and command-and-control survivability.

The network is part of the battlespace.

Intelligence, Attribution, and Public Exposure

Attribution is a central problem in cyber strategy.

Technical evidence may show malware, infrastructure, command patterns, or stolen credentials. Intelligence may add human reporting, signals intelligence, partner data, or long-term pattern analysis.

Public attribution is a policy decision. The government may expose a state actor to warn victims, impose costs, support sanctions, defend allies, or shape international norms.

Attribution can also be withheld. Revealing too much may compromise sources, methods, or ongoing operations.

The public often sees only the final statement. The intelligence process behind it is usually much larger.

Alliances and Cyber Partnerships

Cyber defense is now an alliance mission.

The United States works with NATO allies, Five Eyes partners, Indo-Pacific allies, private companies, and international cyber agencies to identify threats, share indicators, expose campaigns, and strengthen collective resilience.

This matters because adversary infrastructure often crosses borders. Victims may be in several countries. Malware may move through neutral networks. A campaign against one ally may preview tactics that will later be used against another.

Shared defense improves warning.

It also supports deterrence. A state actor faces a different calculation when malicious activity triggers a coordinated response from multiple governments and major private-sector defenders.

Recommended Government and Strategy Sources

Strategic Bottom Line

Cyber power now sits beside air, land, sea, space, intelligence, and information operations as a core instrument of national power.

State actors use cyber tools because they are useful before war, during crisis, and inside armed conflict. They can steal, prepare, disrupt, signal, coerce, and influence.

The United States response must be equally broad. It requires military cyber forces, secure defense networks, hardened contractors, resilient infrastructure, stronger identity systems, protected data movement, allied coordination, and the ability to impose costs.

The future cyber fight will not be limited to government networks.

It will run through contractors, cloud platforms, telecom systems, software vendors, industrial networks, satellites, and the ordinary data flows that support modern military power.

Cybersecurity is therefore not just a defensive requirement. It is a condition for strategic freedom of action.

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