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When the incoming emails stopped arriving, it seemed innocuous at first. But it would eventually become clear that this was no routine technical problem. Inside a row of gray office buildings in Brussels, a major hacking attack was in progress. And the perpetrators were British government spies. It was in the summer of 2012 that the anomalies were initially detected by employees at Belgium’s largest telecommunications provider, Belgacom. But it wasn’t until a year later, in June 2013, that the company’s security experts were able to figure out what was going on. The computer systems of Belgacom had been infected with a highly sophisticated malware, and it was disguising itself as legitimate Microsoft software while quietly stealing data. Last year, documents from National Security Agency whistleblower Edward Snowden confirmed that British surveillance agency Government Communications Headquarters was behind the attack, codenamed Operation Socialist. And in November, The Intercept revealed that the malware found on Belgacom’s systems was one of the most advanced spy tools ever identified by security researchers, who named it “Regin.”

Publicly, Belgacom has played down the extent of the compromise, insisting that only its internal systems were breached and that customers’ data was never found to have been at risk. But secret GCHQ documents show the agency gained access far beyond Belgacom’s internal employee computers and was able to grab encrypted and unencrypted streams of private communications handled by the company. Belgacom invested several million dollars in its efforts to clean-up its systems and beef-up its security after the attack. However, The Intercept has learned that sources familiar with the malware investigation at the company are uncomfortable with how the clean-up operation was handled—and they believe parts of the GCHQ malware were never fully removed.

The revelations about the scope of the hacking operation will likely alarm Belgacom’s customers across the world. The company operates a large number of data links internationally (see interactive map below), and it serves millions of people across Europe as well as officials from top institutions including the European Commission, the European Parliament, and the European Council. The new details will also be closely scrutinized by a federal prosecutor in Belgium, who is currently carrying out a criminal investigation into the attack on the company. Sophia in ’t Veld, a Dutch politician who chaired the European Parliament’s recent inquiry into mass surveillance exposed by Snowden, told The Intercept that she believes the British government should face sanctions if the latest disclosures are proven.

What sets the secret British infiltration of Belgacom apart is that it was perpetrated against a close ally—and is backed up by a series of top-secret documents, which The Intercept is now publishing.

Between 2009 and 2011, GCHQ worked with its allies to develop sophisticated new tools and technologies it could use to scan global networks for weaknesses and then penetrate them. According to top-secret GCHQ documents, the agency wanted to adopt the aggressive new methods in part to counter the use of privacy-protecting encryption—what it described as the “encryption problem.” When communications are sent across networks in encrypted format, it makes it much harder for the spies to intercept and make sense of emails, phone calls, text messages, internet chats, and browsing sessions. For GCHQ, there was a simple solution. The agency decided that, where possible, it would find ways to hack into communication networks to grab traffic before it’s encrypted.

The Snowden documents show that GCHQ wanted to gain access to Belgacom so that it could spy on phones used by surveillance targets travelling in Europe. But the agency also had an ulterior motive. Once it had hacked into Belgacom’s systems, GCHQ planned to break into data links connecting Belgacom and its international partners, monitoring communications transmitted between Europe and the rest of the world. A map in the GCHQ documents, named “Belgacom_connections,” highlights the company’s reach across Europe, the Middle East, and North Africa, illustrating why British spies deemed it of such high value.

Documents published with this article: Automated NOC detection Mobile Networks in My NOC World Making network sense of the encryption problem Stargate CNE requirements NAC review – October to December 2011 GCHQ NAC review – January to March 2011 GCHQ NAC review – April to June 2011 GCHQ NAC review – July to September 2011 GCHQ NAC review – January to March 2012 GCHQ Hopscotch Belgacom connections

While Gemalto was indeed another casualty in Western governments’ sweeping effort to gather as much global intelligence advantage as possible, the leaked documents make clear that the company was specifically targeted. According to the materials published Thursday, GCHQ used a specific codename — DAPINO GAMMA — to refer to the operations against Gemalto. The spies also actively penetrated the email and social media accounts of Gemalto employees across the world in an effort to steal the company’s encryption keys. Evidence of the Gemalto breach rattled the digital security community. “Almost everyone in the world carries cell phones and this is an unprecedented mass attack on the privacy of citizens worldwide,” said Greg Nojeim, senior counsel at the Center for Democracy & Technology, a non-profit that advocates for digital privacy and free online expression. “While there is certainly value in targeted surveillance of cell phone communications, this coordinated subversion of the trusted technical security infrastructure of cell phones means the US and British governments now have easy access to our mobile communications.”

For Gemalto, evidence that their vaunted security systems and the privacy of customers had been compromised by the world’s top spy agencies made an immediate financial impact. The company’s shares took a dive on the Paris bourse Friday, falling $500 million. In the U.S., Gemalto’s shares fell as much 10 percent Friday morning. They had recovered somewhat — down 4 percent — by the close of trading on the Euronext stock exchange. Analysts at Dutch financial services company Rabobank speculated in a research note that Gemalto could be forced to recall “a large number” of SIM cards. The French daily L’Express noted today that Gemalto board member Alex Mandl was a founding trustee of the CIA-funded venture capital firm In-Q-Tel. Mandl resigned from In-Q-Tel’s board in 2002, when he was appointed CEO of Gemplus, which later merged with another company to become Gemalto. But the CIA connection still dogged Mandl, with the French press regularly insinuating that American spies could infiltrate the company. In 2003, a group of French lawmakers tried unsuccessfully to create a commission to investigate Gemplus’s ties to the CIA and its implications for the security of SIM cards. Mandl, an Austrian-American businessman who was once a top executive at AT&T, has denied that he had any relationship with the CIA beyond In-Q-Tel. In 2002, he said he did not even have a security clearance.

AT&T, T-Mobile and Verizon could not be reached for comment Friday. Sprint declined to comment. Vodafone, the world’s second largest telecom provider by subscribers and a customer of Gemalto, said in a statement, “[W]e have no further details of these allegations which are industrywide in nature and are not focused on any one mobile operator. We will support industry bodies and Gemalto in their investigations.” Deutsche Telekom AG, a German company, said it has changed encryption algorithms in its Gemalto SIM cards. “We currently have no knowledge that this additional protection mechanism has been compromised,” the company said in a statement. “However, we cannot rule out this completely.”

Update: Asked about the SIM card heist, White House press secretary Josh Earnest said he did not expect the news would hurt relations with the tech industry: “It’s hard for me to imagine that there are a lot of technology executives that are out there that are in a position of saying that they hope that people who wish harm to this country will be able to use their technology to do so. So, I do think in fact that there are opportunities for the private sector and the federal government to coordinate and to cooperate on these efforts, both to keep the country safe, but also to protect our civil liberties.”

He agreed to a video chat that turned into a three-hour discussion sprawling from the ethics of surveillance to the downsides of home improvements and the difficulty of securing your laptop.

In recent years, two developments have helped make hacking for the government a lot more attractive than hacking for yourself. First, the Department of Justice has cracked down on freelance hacking, whether it be altruistic or malignant. If the DOJ doesn’t like the way you hack, you are going to jail. Meanwhile, hackers have been warmly invited to deploy their transgressive impulses in service to the homeland, because the NSA and other federal agencies have turned themselves into licensed hives of breaking into other people’s computers. For many, it’s a techno sandbox of irresistible delights, according to Gabriella Coleman, a professor at McGill University who studies hackers. “The NSA is a very exciting place for hackers because you have unlimited resources, you have some of the best talent in the world, whether it’s cryptographers or mathematicians or hackers,” she said. “It is just too intellectually exciting not to go there.”

The Lamb’s memos on cool ways to hunt sysadmins triggered a strong reaction when I wrote about them in 2014 with my colleague Ryan Gallagher. The memos explained how the NSA tracks down the email and Facebook accounts of systems administrators who oversee computer networks. After plundering their accounts, the NSA can impersonate the admins to get into their computer networks and pilfer the data flowing through them. As the Lamb wrote, “sys admins generally are not my end target. My end target is the extremist/terrorist or government official that happens to be using the network … who better to target than the person that already has the ‘keys to the kingdom’?” Another of his NSA memos, “Network Shaping 101,” used Yemen as a theoretical case study for secretly redirecting the entirety of a country’s internet traffic to NSA servers.

“If I turn the tables on you,” I asked the Lamb, “and say, OK, you’re a target for all kinds of people for all kinds of reasons. How do you feel about being a target and that kind of justification being used to justify getting all of your credentials and the keys to your kingdom?” The Lamb smiled. “There is no real safe, sacred ground on the internet,” he replied. “Whatever you do on the internet is an attack surface of some sort and is just something that you live with. Any time that I do something on the internet, yeah, that is on the back of my mind. Anyone from a script kiddie to some random hacker to some other foreign intelligence service, each with their different capabilities — what could they be doing to me?”

“You know, the situation is what it is,” he said. “There are protocols that were designed years ago before anybody had any care about security, because when they were developed, nobody was foreseeing that they would be taken advantage of. … A lot of people on the internet seem to approach the problem [with the attitude of] ‘I’m just going to walk naked outside of my house and hope that nobody looks at me.’ From a security perspective, is that a good way to go about thinking? No, horrible … There are good ways to be more secure on the internet. But do most people use Tor? No. Do most people use Signal? No. Do most people use insecure things that most people can hack? Yes. Is that a bash against the intelligence community that people use stuff that’s easily exploitable? That’s a hard argument for me to make.”

I mentioned that lots of people, including Snowden, are now working on the problem of how to make the internet more secure, yet he seemed to do the opposite at the NSA by trying to find ways to track and identify people who use Tor and other anonymizers. Would he consider working on the other side of things? He wouldn’t rule it out, he said, but dismally suggested the game was over as far as having a liberating and safe internet, because our laptops and smartphones will betray us no matter what we do with them. “There’s the old adage that the only secure computer is one that is turned off, buried in a box ten feet underground, and never turned on,” he said. “From a user perspective, someone trying to find holes by day and then just live on the internet by night, there’s the expectation [that] if somebody wants to have access to your computer bad enough, they’re going to get it. Whether that’s an intelligence agency or a cybercrimes syndicate, whoever that is, it’s probably going to happen.”

There are precautions one can take, and I did that with the Lamb. When we had our video chat, I used a computer that had been wiped clean of everything except its operating system and essential applications. Afterward, it was wiped clean again. My concern was that the Lamb might use the session to obtain data from or about the computer I was using; there are a lot of things he might have tried, if he was in a scheming mood. At the end of our three hours together, I mentioned to him that I had taken these precautions—and he approved. “That’s fair,” he said. “I’m glad you have that appreciation. … From a perspective of a journalist who has access to classified information, it would be remiss to think you’re not a target of foreign intelligence services.” He was telling me the U.S. government should be the least of my worries. He was trying to help me. Documents published with this article: Tracking Targets Through Proxies & Anonymizers Network Shaping 101 Shaping Diagram I Hunt Sys Admins (first published in 2014)

Starting in 2010, EFF members have pushed tech companies to follow crypto best practices. We applauded when Facebook and Twitter implemented HTTPS by default, and when Wikipedia and several other popular sites later followed suit. Google has also put pressure on the tech community by using HTTPS as a signal in search ranking algorithms and, starting this year, showing security warnings in Chrome when users load HTTP sites that request passwords or credit card numbers. EFF’s Encrypt the Web Report also played a big role in tracking and encouraging specific practices. Recently other organizations have followed suit with more sophisticated tracking projects. For example, Secure the News and Pulse track HTTPS progress among news media sites and U.S. government sites, respectively.

But securing large, popular websites is only one part of a much bigger battle. Encrypting the entire web requires HTTPS implementation to be accessible to independent, smaller websites. Let’s Encrypt and Certbot have changed the game here, making what was once an expensive, technically demanding process into an easy and affordable task for webmasters across a range of resource and skill levels. Let’s Encrypt is a Certificate Authority (CA) run by the Internet Security Research Group (ISRG) and founded by EFF, Mozilla, and the University of Michigan, with Cisco and Akamai as founding sponsors. As a CA, Let’s Encrypt issues and maintains digital certificates that help web users and their browsers know they’re actually talking to the site they intended to. CAs are crucial to secure, HTTPS-encrypted communication, as these certificates verify the association between an HTTPS site and a cryptographic public key. Through EFF’s Certbot tool, webmasters can get a free certificate from Let’s Encrypt and automatically configure their server to use it. Since we announced that Let’s Encrypt was the web’s largest certificate authority last October, it has exploded from 12 million certs to over 28 million. Most of Let’s Encrypt’s growth has come from giving previously unencrypted sites their first-ever certificates. A large share of these leaps in HTTPS adoption are also thanks to major hosting companies and platforms--like WordPress.com, Squarespace, and dozens of others--integrating Let’s Encrypt and providing HTTPS to their users and customers.

Unfortunately, you can only use HTTPS on websites that support it--and about half of all web traffic is still with sites that don’t. However, when sites partially support HTTPS, users can step in with the HTTPS Everywhere browser extension. A collaboration between EFF and the Tor Project, HTTPS Everywhere makes your browser use HTTPS wherever possible. Some websites offer inconsistent support for HTTPS, use unencrypted HTTP as a default, or link from secure HTTPS pages to unencrypted HTTP pages. HTTPS Everywhere fixes these problems by rewriting requests to these sites to HTTPS, automatically activating encryption and HTTPS protection that might otherwise slip through the cracks.

Our goal is a universally encrypted web that makes a tool like HTTPS Everywhere redundant. Until then, we have more work to do. Protect your own browsing and websites with HTTPS Everywhere and Certbot, and spread the word to your friends, family, and colleagues to do the same. Together, we can encrypt the entire web.