What Is Espionage? Types, Penalties, and Proof

Espionage is the act of secretly collecting protected information and passing it to someone not authorized to receive it. That information can be military or diplomatic (national defense secrets) or commercial (trade secrets held by private companies). Federal law treats both as serious crimes, and the penalties for espionage run from a decade in prison for careless handling of classified material all the way to life imprisonment or the death penalty for delivering defense secrets to a foreign government.

National Defense Espionage

The core espionage statutes sit in Chapter 37 of Title 18 of the U.S. Code. Two provisions do most of the work. 18 U.S.C. § 793 covers gathering, transmitting, or losing information related to the national defense.¹ 18 U.S.C. § 794 goes further, targeting anyone who delivers defense information to a foreign government.²

“National defense information” is broader than classified documents in a safe. It reaches blueprints of military installations, technical diagrams of weapons systems, strategic troop movements, and the inner workings of ships, aircraft, and communications equipment. Oral information about military plans counts too. A person with authorized access who lets any of this material leave its proper place of custody can be charged under § 793, whether the removal was deliberate or the result of gross negligence.³

A narrower statute, 18 U.S.C. § 798, covers classified communications intelligence specifically: cryptographic systems, code-breaking methods, and material gathered by intercepting foreign government communications. Unauthorized disclosure of any of this carries up to ten years.⁴

Economic Espionage and Trade Secret Theft

Not every espionage case involves military material. The Economic Espionage Act creates two separate crimes for stealing commercial trade secrets, and the line between them drives the sentence.

18 U.S.C. § 1831 is economic espionage in the strict sense: stealing a trade secret with the intent to benefit a foreign government or one of its agents. An individual convicted under § 1831 faces up to 15 years in prison and a fine of up to $5,000,000. An organization faces the greater of $10,000,000 or three times the value of the stolen secret, including research and development costs the organization avoided.⁵

18 U.S.C. § 1832 covers trade secret theft for anyone’s economic benefit, with no foreign connection required. A departing employee who copies proprietary software for a new employer fits here rather than under § 1831. Penalties drop accordingly: up to 10 years in prison for an individual, and up to $5,000,000 or three times the secret’s value for an organization.⁶

Under federal law, a “trade secret” is any financial, business, scientific, technical, or engineering information that has economic value because it isn’t publicly known and that the owner takes reasonable steps to protect. Formulas, prototypes, compiled data, software code, and manufacturing processes all qualify.⁷

Cyber Espionage

Spying through a keyboard has its own provision. The Computer Fraud and Abuse Act, 18 U.S.C. § 1030, makes it a crime to access a computer without authorization, obtain information classified for national defense or foreign relations reasons, and then transmit or retain that information with reason to believe it could injure the United States or help a foreign nation. The penalty is up to 10 years on a first offense and up to 20 years for a repeat violation.⁸

These charges often stack on top of Espionage Act counts. A hacker who breaks into a defense contractor’s network and exfiltrates weapons schematics can be charged under both § 793 and § 1030. The CFAA also allows confiscation of equipment used in the intrusion and holds accomplices to the same level of liability as the person who carried out the hack.

What Prosecutors Have to Prove

A common misconception is that espionage requires proof the defendant wanted to damage the United States. It doesn’t. Under § 793 and § 794, the mental state is satisfied when the person had “reason to believe” the information could injure the country or help a foreign nation. In Gorin v. United States (1941), the Supreme Court said that standard amounts to acting in bad faith, and it’s noticeably easier for the government to meet than specific intent to harm.³

For economic espionage under § 1831, prosecutors must show the defendant knew or intended that the theft would benefit a foreign government, instrumentality, or agent. For trade secret theft under § 1832, they must prove the defendant intended to convert the secret for someone’s economic benefit and knew it would injure the owner.⁵⁶

One subsection stands apart. Section 793(f) requires no intent to spy at all. A person entrusted with national defense information who allows it to leave its secure location through gross negligence can face up to 10 years. This is the provision reached for when classified material is handled carelessly and no foreign power is involved.³

Penalties for Espionage

The sentence depends on the statute charged and the damage the conduct caused.

Prison

Each count of gathering, transmitting, or losing defense information under § 793 carries up to 10 years.¹ Delivering defense information to a foreign government under § 794 carries any term of years up to and including life. Federal parole was abolished in 1987, so a defendant sentenced in federal court must serve at least 85 percent of the term imposed.²

The Death Penalty

Section 794 is one of the few federal statutes that authorizes capital punishment. A court can impose it when the espionage resulted in identifying a U.S. intelligence agent whose cover was blown and who then died, or when the offense directly involved nuclear weapons, military satellites, early warning systems, war plans, communications intelligence, or any other major weapons system or element of defense strategy.²

Fines

National defense espionage under § 793 and § 794: fines are imposed “under this title,” leaving the court broad discretion.
Economic espionage with foreign ties under § 1831: up to $5,000,000 for an individual; the greater of $10,000,000 or three times the stolen secret’s value for an organization.⁵
Trade secret theft without foreign ties under § 1832: fines under the general federal fine statute for individuals; up to $5,000,000 or three times the secret’s value for organizations.⁶

Mandatory Forfeiture

Both § 793 and § 794 require convicted defendants to forfeit any property or proceeds obtained from the espionage, along with any property used to carry it out. Forfeiture is mandatory regardless of state law.²¹

Helping a Spy Is Also a Crime

You don’t have to do the spying yourself to face federal charges. Under 18 U.S.C. § 792, anyone who harbors or hides a person they know or have reasonable grounds to suspect has committed, or is about to commit, an offense under § 793 or § 794 faces up to 10 years. This applies even if you had no part in the underlying espionage.⁹

1
Office of the Law Revision Counsel. 18 USC 793 – Gathering, Transmitting or Losing Defense Information
2
Office of the Law Revision Counsel. 18 USC 794 – Gathering or Delivering Defense Information to Aid Foreign Government
3
Office of the Law Revision Counsel. 18 U.S. Code 793 – Gathering, Transmitting or Losing Defense Information
4
Office of the Law Revision Counsel. 18 USC 798 – Disclosure of Classified Information
5
Office of the Law Revision Counsel. 18 U.S. Code 1831 – Economic Espionage
6
Office of the Law Revision Counsel. 18 U.S. Code 1832 – Theft of Trade Secrets
7
Office of the Law Revision Counsel. 18 USC 1839 – Definitions
8
Office of the Law Revision Counsel. 18 U.S. Code 1030 – Fraud and Related Activity in Connection With Computers
9
Office of the Law Revision Counsel. 18 USC 792 – Harboring or Concealing Persons