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Some cracks are beginning to show in the Libra Association, the nonprofit group of 28 firms that have signed on to participate in Facebook’s planned digital currency network, called Libra. That number is now down to 27 because PayPal has decided to withdraw.

The news: “PayPal has made the decision to forgo further participation in the Libra Association at this time,” the company said in a press statement that also said PayPal remains supportive of Libra’s “aspirations.” 

Why is this happening? PayPal hasn’t provided a specific reason, but the announcement closely follows a report from the Financial Times that the company did not attend a meeting of the Libra Association on Thursday and had been considering dropping out of the project. According to the FT, this was due in part to the chilly reception that Libra has received so far from regulators. 

More defections coming? The FT report came after a separate report from the Wall Street Journal that Visa and Mastercard were also “reconsidering their involvement following a backlash from US and European government officials.” According to the WSJ, executives for some Libra Association members have declined Facebook’s requests to support the project publicly.

A big “if”: Core to Facebook’s pitch to policymakers is that it won’t be in sole control of the Libra digital currency, which will run on a private blockchain network maintained by the Libra Association. The group is meant to eventually expand from 28 members (well, now 27) to 100 by its launch date, which Facebook has said will be June of 2020. Facebook has also said that each Libra Association member will invest $10 million in the project. But that hasn’t happened yet, according to the WSJ, and members aren’t bound to the deal. If Libra is ever going to launch, Facebook will need not only to persuade skeptical policymakers, but also to convince its skittish partners not to follow PayPal to the exit.

Microsoft cybersecurity officials say they saw Iranian hackers attempt to breach accounts from a US presidential campaign, as well as from US government officials, journalists, and Iranians living...

The company sent an alert to the Democratic National Committee on Friday warning about attempts, the Wall Street Journal reported

The hacking campaign is a stark reminder that basic security steps like two-factor authentication are strong and important defenses against even nationally sponsored operations.

The targets: Tom Burt, Microsoft’s vice president of security and trust, wrote that the Iranians failed in their attempt to hack US presidential campaign and government officials. The hackers made “more than 2,700 attempts to identify consumer email accounts belonging to specific Microsoft customers and then attack 241 of those accounts.”

Burt and Microsoft said they will not identify the victims of the hacking campaign. US presidential campaigns have been targets and victims of hacking for years, most notably Democrat officials during the 2016 campaign. Such activity extends back at least to 2008, when both candidates suffered breaches.

Sticking to the basics: The Iranian hacking group, code-named Phosphorous, gathered information about targets and then tried to manipulate password reset and account recovery features in attempts to take over accounts.

“For example, they would seek access to a secondary email account linked to a user’s Microsoft account, then attempt to gain access to a user’s Microsoft account through verification sent to the secondary account,” Burt wrote. “In some instances, they gathered phone numbers belonging to their targets and used them to assist in authenticating password resets.”

The attacks are not technically sophisticated. They had none of the headline-grabbing exploits that can excite observers and dominate the news. Instead, this operation illustrates how important the fundamentals of cybersecurity are for both attackers and their targets.

Microsoft encouraged all users to set up multi-factor authentication through solutions like the passwordless Microsoft Authenticator.

A long trail: Phosphorous has been active for at least six years. They have long been known to target businesses, government agencies, journalists, and activists involved in the Middle East. 

Earlier this year, Microsoft used a court order to shut down dozens of websites used by the hacking group to spoof well-known companies and trick victims. It’s a legal tactic the company has used repeatedly, against actors including the Russian hacking group known as Fancy Bear.

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The news: A paralyzed man has walked again thanks to a brain-controlled exoskeleton suit. Within the safety of a lab setting, he was also able to control the suit’s arms and hands, using two sensors...

How it worked: Thibault had surgery to place two implants, each containing 64 electrodes, on the parts of the brain that control movement. Software then translated the brain waves read by these implants into instructions for movement. The development of the exoskeleton, by Clinatec and the University of Grenoble, is described in a paper in The Lancet this week.

Herculean effort: Thibault trained for months, using his brain signals to control a video game avatar in order to hone the skills required to operate exoskeleton, which was held up by a ceiling-mounted harness. He was able to walk slowly in the suit and then stop, as he chose.

The future: The hope is that one day similar technology could eventually let people in wheelchairs move them using their minds. It’s an impressive breakthrough, but the device is many years away from being publicly available. For example, researchers need to find a way to get the suit to safely balance itself before it can be used outside the laboratory.

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The news: US Attorney General William Barr, along with counterparts in the UK and Australia, today published an open letter to Facebook CEO Mark Zuckerberg asking him to delay plans to deploy...

Why? The politicians say they are worried that the added privacy will make it harder for law enforcement agencies to find illegal activity conducted on Facebook, like terrorism or child sexual exploitation. They want to ensure that these agencies can decrypt messages during their investigations. This has been coming: Barr raised the issue in a speech in July.

Facebook’s response: In a statement, company officials wrote: “We believe people have the right to have a private conversation online, wherever they are in the world.” They added: “We strongly oppose government attempts to build backdoors because they would undermine the privacy and security of people everywhere.”

Facebook is correct. If you start weakening encryption by creating backdoors, it degrades security for everyone—whether they have good motives or bad. A backdoor is a backdoor, and once created, there’s a risk it will be used by the very same criminals politicians are trying to stop. Indeed, we have already seen this happen when Microsoft worked with the NSA to build backdoors into its products. That decision led to crippling, costly ransomware attacks like WannaCry. Not only that, but in many places in the world protesters and activists use encrypted messaging to organize against repressive regimes. Building backdoors that the government can access would render the services useless.

Despite that, the US Justice Department has been pushing against encryption for over a decade now, saying it allows criminals to “go dark.” It’s an argument that has been going on for some time, and it is unlikely to end here.

And why all this now? Facebook already provides end-to-end encryption by default in WhatsApp, but it has promised to expand this to its other platforms, like Facebook Messenger and messaging on Instagram. It says this is part of a shift to become a “privacy-focused communications platform.” However, it also looks rather like an effort to integrate its disparate units more tightly, thus making it harder for regulators to break the company up (leaked recordings show how deeply concerned Zuckerberg is about this prospect.)

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Network science reveals the secrets of the world’s best soccer team

A new kind of analysis shows why the Barcelona team of 2009-10 stands head and shoulders above the rest. And the same approach could do the same for other sports.