PCMag editors select and review products independently. If you buy through affiliate links, we may earn commissions, which help support our testing.

Main Menu

For decades, encryption provider Crypto AG sold technology to countries around the globe while it was secretly under the control of the CIA, according to The Washington Post and German broadcaster ZDF.

 & Michael Kan Principal Reporter

Our team tests, rates, and reviews more than 1,500 products each year to help you make better buying decisions and get more from technology.

Our Expert
LOOK INSIDE PC LABS HOW WE TEST
65 EXPERTS
43 YEARS
41,500+ REVIEWS
(Saul Loeb/AFP via Getty Images)

For decades, the CIA spied on governments across the globe by using a Swiss company to sell hacked encryption equipment to unsuspecting clients, including both allies and foes, according to The Washington Post and German broadcaster ZDF.

The report, which cites classified CIA documents, focuses on the company Crypto AG, which was a major producer of old-school mechanical encryption machines for the US government during World War II. By the early 1950s, American spies began to worry Crypto AG might sell the same technology to the US’s enemies during the Cold War, including Russia and China.

So in response, the CIA struck a partnership with Crypto AG to sell only the best encryption tech to countries approved by the US. However, CIA spies eventually saw an even bigger opportunity; with the aid of the NSA, the agency decided to tamper with the products themselves. In 1970, the CIA set in motion a plan to secretly buy Crypto AG with West Germany’s spy agency, the BND.

In the two decades since, Crypto AG’s sales flourished as the company sold new electronic-based encryption machines to government customers, including Saudi Arabia, Iran, Italy, Indonesia, Iraq, Libya, and South Korea. Little did they know the products were actually rigged to send encrypted messages that could be easily decoded. This allowed American and German spies to pull in valuable intelligence concerning the 1979 Iran hostage crisis, the Falklands War, and track assassination campaigns in South America. (China and Russia, however, were never customers.)

The ruse managed to go largely undetected until 1992, when Iran detained a Crypto AG salesman, who was later released and began voicing his suspicions to Swiss news organizations about the true nature of his company’s business. In 1995, The Baltimore Sun also ran a story on how the NSA had secretly rigged Crypto AG encryption machines.

Around the same time, Germany’s BND exited the Crypto AG business. However, the CIA maintained control of the company while buying up at least two other firms, presumably to circulate more rigged encryption technology. It was only in 2018 when the CIA sold off Crypto AG’s assets due to the company’s products falling out of favor as online encryption became the norm.

The reporting from the Post and ZDF provides a fuller account of a CIA-led effort to rig a top encryption provider at a time when the US government has been demanding Apple and Facebook backdoor their own encryption technologies for law enforcement purposes. 

The reporting also helps explains why the US has been trying to stop Chinese vendor Huawei from selling its telecommunications technology to mobile carriers across the globe. Ironically, US officials fear the Chinese government will do the same and use Huawei as springboard to spy on customers. To counter Huawei, US Attorney General William Barr last week advocated for the federal government to consider buying a majority stake in European networking vendors Nokia or Ericsson. 

The CIA declined to comment on the Post's reporting. 

Further Reading

More Security Reviews

More Security Best Picks

About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

Read full bio